County of Nassau

(Princely) County of Nassau
Principalities of Nassau
*(Gefürsteter) Grafschaft Nassau* (German)
*Fürstentümer Nassau* (German)
(Princely) County of Nassau; Principalities of Nassau (Gefürsteter) Grafschaft Nassau (German); Fürstentümer Nassau (German)
1125–1806
	Coat of arms
	County of Nassau in 1547
Status	County
Capital	Nassau
Common languages	German (Rhine Franconian dialects, Moselle Franconian dialects)
Government	County
Historical era	Middle Ages
• City founded	915
• Rupert I claims title of count	1125
• Comital title acknowledged	1159
• Partitioned multiple times	1255–1806
• Remaining parts unified to form duchy	1806
Preceded by	Succeeded by
	Bishopric of Worms
Duchy of Nassau
Today part of	Germany

Nassau Castle

The County of Nassau was a German state within the Holy Roman Empire and later part of the German Confederation. Its ruling dynasty, the male line of which is now extinct, was the House of Nassau.

Origins

Nassau, originally a county, developed on the lower Lahn river in what is known today as Rhineland-Palatinate. The town of Nassau was founded in 915.^[1] Dudo of Laurenburg held Nassau as a fiefdom as granted by the Bishopric of Worms. His son, Rupert, built the Nassau Castle there around 1125, declaring himself "Count of Nassau". This title was not officially acknowledged by the Bishop of Worms until 1159 under the rule of Rupert's son, Walram. By 1159, the County of Nassau effectively claimed rights of taxation, toll collection, and justice, at which point it can be considered to become a state.^[1]

The Nassauers held the territory between the Taunus and the Westerwald at the lower and middle Lahn. By 1128, they acquired the bailiwick of the Bishopric of Worms, which had numerous rights in the area, and thus created a link between their heritage at the lower Lahn and their possessions near Siegen. In the middle of the 12th century, this relationship was strengthened by the acquisition of parts of the Hesse-Thüringen feudal kingdom, namely the Herborner Mark, the Kalenberger Zent and the Court of Heimau (Löhnberg). Closely linked to this was the "Lordship of Westerwald", also in Nassau's possession at the time. At the end of the 12th century, the House acquired the Reichshof Wiesbaden, an important base in the southwest.

In 1255, after the Counts of Nassau acquired the estates of Weilburg, the sons of Count Henry II divided Nassau for the first time. Walram II received the county of Nassau-Weilburg. From 1328 on, his younger brother, Otto I, held the estates north of the Lahn river, namely the County of Nassau-Siegen and Nassau-Dillenburg. The boundary line was essentially the Lahn, with Otto receiving the northern part of the county with the cities of Siegen, Dillenburg, Herborn and Haiger and Walram retaining the section south of the river, including the cities of Weilburg and Idstein.

County of Nassau-Weilburg

Walram's son Adolf became King of Germany in 1292. His son Count Gerlach abdicated in 1344 and the County was divided under his sons in 1355

County of Nassau-Weilburg, again divided from 1442 to 1574
- County of Nassau-Saarbrücken (Elder)
- County of Nassau-Weilburg
County of Nassau-Wiesbaden, again divided from 1480 to 1509
- County of Nassau-Idstein
- County of Nassau-Wiesbaden

fell back to Nassau-Weilburg in 1605

County of Nassau-Sonnenberg, partitioned among Nassau-Wiesbaden and Nassau-Weilburg in 1405

In 1605, all parts of Nassau-Weilburg were again unified under Count Louis II; however, after his death in 1627, his sons divided the county again

County of Nassau-Idstein, fell to Nassau-Ottweiler in 1721
County of Nassau-Saarbrücken (Younger), divided again in 1640
- County of Nassau-Saarbrücken, fell to Nassau-Ottweiler in 1723
- County of Nassau-Ottweiler, fell to Nassau-Usingen in 1728
- County of Nassau-Usingen, Principality in 1688
County of Nassau-Weilburg (Younger)

After Nassau-Usingen had inherited Nassau-Ottweiler with former Nassau-Idstein and Nassau-Saarbrücken, it was reunified with Nassau-Weilburg and raised to the Duchy of Nassau in 1806.

County of Nassau-Dillenburg

After the death of Count Otto I, his county was divided between his sons in 1303:

County of Nassau-Dillenburg, fell to Nassau-Siegen in 1328
County of Nassau-Hadamar (Elder), fell to Nassau-Dillenburg in 1394
County of Nassau-Siegen, called Nassau-Dillenburg from 1328 on, again got divided from 1341 to 1561:
- County of Nassau-Beilstein (Elder)
- County of Nassau-Dillenburg (Elder)–1606)

In 1504, Henry III of Nassau-Dillenburg inherited the County's estates at Breda in the Duchy of Brabant, while his younger brother William became Count of Nassau-Dillenburg in 1516. After the son of Henry III, René of Châlon died in 1544, Count William's eldest son William the Silent became Prince of Orange and Lord of Breda, Stadtholder in the Low Countries from 1559 on. His younger brother, John VI, again reunited all Nassau-Dillenburg possessions in 1561, though the County was again divided after his death in 1606.

County of Nassau-Hadamar (Younger), Principality in 1650, fell to Nassau-Diez in 1743
County of Nassau-Siegen, (1607–23), again got divided from 1623 to 1734:
- County of Nassau-Siegen (Protestant), Principality in 1664, became extinct in 1734
- County of Nassau-Siegen (Catholic), Principality, fell to Nassau-Diez in 1743
County of Nassau-Dillenburg, fell to Nassau-Beilstein in 1620
County of Nassau-Beilstein (Younger), called Nassau-Dillenburg (Younger) from 1620 on, Principality in 1652, fell to Nassau-Dietz in 1739
County of Nassau-Dietz, fell to Joachim Murat's Grand Duchy of Berg after the dissolution of the Holy Roman Empire in 1806

The Counts of Nassau-Dietz, descendants of William Frederick were stadtholders of Friesland, Groningen and Drenthe and Princes of Orange from 1702 on. When they lost their Dutch possessions during the Napoleonic Wars, they were compensated with the Principality of Nassau-Orange-Fulda. Though they lost their German possessions in 1806, the House of Orange-Nassau, through female succession, was the reigning house of the Grand Duchy of Luxembourg until 1890 and is still the royal house of the Netherlands.

Rulers

House of Nassau

Partitions of Nassau under House of Nassau rule


County of Laurenburg/ Nassau (1093-1255)
County of Northern Nassau (Ottonian Line) (1255-1303)							County of Southern Nassau (Walramian Line) (1255-1355)
County of Nassau-Siegen (1st creation) (1303-1328)		County of Nassau-Hadamar (1st creation) (1303-1394)

County of Nassau-Beilstein (1343-1561)
										County of Nassau-Sonnenberg (1355-1404)

	County of Nassau-Dillenburg (1303-1654) (Siegen line from 1328) Raised to: Principality of Nassau-Dillenburg (1654-1739)						County of Nassau-Weilburg (1355-1806)
						Barony of Nassau-Breda (1403-1544) Raised to, and renamed as: Principality of Orange-Nassau (1st creation, Dillenburg line) (1544-1702)				County of Nassau-Idstein (1st creation) (1355-1605) (divided 1370-86; 1480-1509; 1554-56; 1564-66)
									County of Nassau-Saarbrücken (1st creation) (1429-1574)



				County of Nassau-Siegen (2nd creation) (1606-1652/64) (In 1623 divided in Catholic and Protestant ruling lines) Both lines raised to: Catholic Principality of Nassau-Siegen (1652-1743) and Protestant Principality of Nassau-Siegen (1664-1734)
			County of Nassau-Hadamar (2nd creation) (1620-1650) Raised to: Principality of Nassau-Hadamar (1650-1711)
											County of Nassau-Idstein (2nd creation) (1627-1688) Raised to: Principality of Nassau-Idstein (1688-1721)
									County of Nassau-Ottweiler (1659-1721)


					County of Nassau-Dietz (1606-1654) Raised to: Principality of Nassau-Dietz (1654-1702) Renamed as: Principality of Orange-Nassau (2nd creation, Dietz line) (1702-1806)				County of Nassau-Saarbrücken (2nd creation) (1627-1728)

								County of Nassau-Usingen (1659-1688) Raised to: Principality of Nassau-Usingen (1688-1806)


												Principality of Nassau-Saarbrücken (1741-1797)
												Annexed by France

Orange-Nassau (2nd creation, Dietz line) (1813-1815)							Duchy of Nassau (1806-1866)

Annexed by Prussia

Table of rulers

Ruler	Born	Reign	Death	Ruling part	Consort	Notes
Dudo	?	1093-1117	c.1117	County of Laurenburg/Nassau	Irmgard/Demudis of Arnstein three children	Founder of the family and the county.
Rupert I	c.1090	1117-1154	c.1154	County of Laurenburg/Nassau	Beatrix of Limburg before 1135 four children	Sons of Dudo, ruled jointly. Arnold abdicated from the co-regency.
Arnold I	c.1090	1117-1148	After 1154	County of Laurenburg/Nassau	Unmarried
Arnold II	c.1137	1154-1159	c.1159	County of Laurenburg/Nassau	Unknown at least one child	Sons of Rupert I, ruled jointly.
Rupert II	c.1137	1154-1159	c.1159	County of Laurenburg/Nassau	Beatrix at least two children	Sons of Rupert I, ruled jointly.
Regency of Beatrix of Limburg (1159-1160)						Cousins, ruled together. Rupert III, Arnold II's son, co- ruled with Henry I, Rupert II's son. In 1167, Henry I died in Rome during the August 1167 epidemic (after the Battle of Monte Porzio). His death made his brother Waleran replace him in the co-regency. In 1191, Rupert III's death made his son Herman the new co-regent, but he abdicated the next year. In 1193, Waleran I (then already sole ruler) would become the first legalized Count of Nassau.
Rupert III the Bellicose	before 1159	1159-1191	23/28 December 1191	County of Laurenburg/Nassau	Elisabeth of Leiningen 1169 two children
Henry I	before 1159	1159-1167	August 1167	County of Laurenburg/Nassau	Unmarried
Waleran I	c.1146	1167-1198	1 February 1198	County of Laurenburg/Nassau	Kunigunde of Ziegenhain before 1135 four children
Herman	?	1191-1192	After 1206	County of Laurenburg/Nassau	Unmarried
Henry II the Rich	c.1180	1198-1251	26 April 1251	County of Nassau	Matilda of Guelders before 1221 eleven children	Sons of Waleran I, ruled together. From 1230 to 1240, Rupert was a Knight of the Teutonic Order.
Rupert IV	c.1180	1198-1230	c.1239	County of Nassau	Gertrude of Kleeberg c. 11 December 1215 no children
Henry II's sons, Waleran II and Otto I, who were ruling together, split the Nassau possessions on 17 December 1255, by a treaty called [[:de:Prima divisio, which determined the Lahn river as border of the two halves: to the south, called Southern Nassau, was ruled by Waleran and his descendants, who became known as the Walramian Line, which became important in the County of Nassau and Luxembourg; to the north, called Northern Nassau the county was ruled by Otto and his descendants, who became known as the Ottonian Line, which would inherit parts of Nassau, France and the Netherlands.
Otto I	c.1220	1251-1255	between 3 May 1289 and 19 March 1290	County of Nassau	Agnes of Leiningen five children	Son of Henry II, received the land to the north of Lahn river: He was count of Nassau in Dillenburg, Hadamar, Siegen, Herborn and Beilstein.
Otto I	c.1220	1255-1289/90	between 3 May 1289 and 19 March 1290	Northern Nassau	Agnes of Leiningen five children
Waleran II	c.1220	1251-1255	24 January 1276	County of Nassau	Adelaide of Katzenelnbogen before 1250 seven children	Son of Henry II, received the land to the south of Lahn river: He was count of Nassau in Wiesbaden, Idstein, and Weilburg.
Waleran II	c.1220	1255-1276	24 January 1276	Southern Nassau	Adelaide of Katzenelnbogen before 1250 seven children
Adolph I	c.1255	1276-1298	2 July 1298	County of Southern Nassau	Imagina of Isenburg-Limburg 1270 eight children	In 1292 was crowned King of Germany.
Emicho I	before 1289	1289/90-1303	7 June 1334	County of Northern Nassau	Anna of Nuremberg before 1297 eight children	Sons of Otto I, ruled together until 1303, when they divided the land: Henry received Nassau-Siegen (Siegen, Ginsberg, Haiger, and the Westerwald), Emicho received Nassau-Hadamar and John received Nassau-Dillenburg. However, after the childless death of John, Nassau-Dillenburg (and the towns of Dillenburg, Herborn, and Beilstein) fell to Nassau-Siegen, which adopted the name Nassau-Dillenburg. Siegen and Dillenburg were united until 1606.
Emicho I	before 1289	1303-1334	7 June 1334	County of Hadamar	Anna of Nuremberg before 1297 eight children
John I	c.1290	1289/90-1303	10 August 1328	County of Northern Nassau	Unmarried
John I	c.1290	1303-1328	10 August 1328	County of Dillenburg	Unmarried
Henry I	before 1288	1289/90-1303	July/August 1343	County of Northern Nassau	Adelaide of Sponheim-Heinsberg 1302 five children
		1303-1328		County of Siegen
		1328-1343		County of Dillenburg
Nassau-Dillenburg was annexed to Nassau-Siegen, which adopted the name Nassau-Dillenburg
Rupert V	c.1280	1298-1304	2 November 1304	County of Southern Nassau	Unmarried	Left no descendants. He was succeeded by his brother, Gerlach.
Gerlach I	c.1285	1304-1355	7 January 1361	County of Southern Nassau	Agnes of Hesse 1307 seven children Irmgard of Hohenlohe-Weikersheim before 4 January 1337 two children	Brothers of Rupert V, ruled jointly for a brief period (1312-1316). In 1355 Gerlach abdicated to his sons, who divided the land.
Waleran III	c.1294	1312-1316	22 December 1324	County of Southern Nassau	Unmarried
John I	after 1302	1334-1365	20 January 1365	County of Hadamar	Elisabeth of Waldeck 1331 ten children	Sons of Emicho I, ruled jointly.
Emicho II	after 1302	1334-1359	1 March 1359	County of Hadamar	Unmarried	Sons of Emicho I, ruled jointly.
Otto II	c.1305	1343-1351	6 January 1351	County of Dillenburg	Adelaide of Vianden 23 December 1331 four children	Children of Henry I, divided the land: Otto kept Dillenburg, and Henry inherited Beilstein, partitioned from Dillenburg.
Henry I	11 June 1323	1343-1378	28 October 1378	County of Beilstein	Imagina of Westerburg 1339 three children
Adelaide of Vianden	c.1305	1351-1376	30 September 1376	County of Dillenburg (at Mengerskirchen)	Otto II, Count of Nassau-Dillenburg 23 December 1331 four children	Widow of Otto II, inherited Mengerskirchen from her husband. After ther death, the town went to Nassau-Beilstein.
John I	c.1340	1351-1416	4 September 1416	County of Dillenburg	Margaretha of the Marck 30 November 1357 six children	Inherited Vianden.
Crato	c.1340	1355-1356	1356	County of Sonnenberg	Unmarried	Children of Gerlach I, divided the land: Crato inherited Sonnenberg, died with no descendants, and was succeeded by his brother Rupert. John inherited Weilburg and passed it to his descendants. Adolph inherited Idstein and passed it to his descendants. Rupert inherited his brother Crato's land of Sonnenberg, and, with no children left, passed it to his wife Anna.
John I	c.1309	1355-1371	20 September 1371	County of Weilburg	Gertrude of Merenberg 1333 one child Johanna of Saarbrücken 1353 seven children
Adolph I	c.1307	1355-1370	17 January 1370	County of Idstein	Margaret of Nuremberg 1322 fourteen children
Rupert (VI) the Warrior	c.1340	1356-1390	4 September 1390	County of Sonnenberg	Anna of Nassau-Hadamar 1362 no children
Elisabeth of Waldeck	after 1302	1365-1381	c.1381	County of Hadamar (at Ems)	John I, Count of Nassau-Hadamar 1331 ten children	Widow of John I, ruled at Ems.
Henry I	after 1331	1365-1368	1368	County of Hadamar	Unmarried	Left no descendants. He was succeeded by his brother.
Emicho III	after 1331	1368-1394	1394	County of Hadamar	Unmarried	Brother of Henry, left no descendants. The land was annexed to Nassau-Dillenburg.
Gerlach II	1333	1370-1386	1386	County of Idstein	Agnes of Veldenz c.1360 no children	Children of Adolph I, divided the land: Gerlach kept Idstein and Waleran inherited Wiesbaden. Waleran reunited Idstein after his brother's death.
Waleran IV	1354	1370-1393	7 November 1393	County of Idstein (At Wiesbaden 1370-86)	Bertha of Westerburg 1374 two children
Joanna of Saarbrücken	1330	1371-1381	October 1381	County of Weilburg (at Neuweilnau)	John I, Count of Nassau-Weilburg 1353 seven children	Joanna held her estate at Neuweilnau until her death; while providing the regency for her son on the rest of Weilburg; At his death, Philip would divide the land for his sons: the eldest received Nassau-Weilburg; the youngest, her original county of Saarbrücken.
Regencies of Joanna of Saarbrücken (1371-1381) and Frederick of Blankenheim, Bishop of Strasbourg (1381-1382)
Philip I	1368	1371-1429	2 July 1429	County of Weilburg	Anna of Hohenlohe-Weikersheim 1385 one child Elisabeth of Lorraine-Vaudémont 1412 four children
Henry II	29 September 1374	1378-1412	12 October 1412	County of Beilstein	Catherine of Randerode 1383 four children	Sons of Henry I, ruled jointly.
Rainhard	1374	1378-1414/18	between 30 December 1414 and 17 April 1418	County of Beilstein	Unmarried	Sons of Henry I, ruled jointly.
Anna	c.1330	1390-1404	21 January 1404	County of Sonnenberg	Rupert, Count of Nassau-Sonnenberg 1362 no children	Heir of her husband and her brother. In 1403, renounced the claims over Hadamar and, after her own death, Sonnenberg went to Weilburg line.
Anna	c.1330	1394-1403	21 January 1404	County of Hadamar	Rupert, Count of Nassau-Sonnenberg 1362 no children
Nassau-Hadamar was annexed to Nassau-Dillenburg
Nassau-Sonnenberg was annexed to Nassau-Weilburg
Adolph II	1386	1393-1426	16 July 1426	County of Idstein	Margaret of Baden-Baden March 1418 six children
John I	After 1383	1414/18-1473	1473	County of Beilstein	Matilda of Isenburg 1415 four children Johanna von Gemen 1477 one child	Sons of Henry II, ruled jointly.
Henry III	1418	1414/18-1477	12 September 1477	County of Beilstein	Unmarried	Sons of Henry II, ruled jointly.
Adolph I	1362	1388-1420	12 June 1420	County of Dietz	Judith of Dietz 1376 one child	Sons of John I, ruled jointly, as Tetrarchs. Counts Adolph and Engelbert inherited via his wives half of Diez and Breda, respectively, which became, after their deaths, part of Nassau patrimony.
Adolph I	1362	1416-1420	12 June 1420	County of Dillenburg	Judith of Dietz 1376 one child
John II the Elder	1365	1416-1443	May 1443	County of Dillenburg	Unmarried
Engelbert I	1370	1403-1442	3 May 1442	Barony of Breda	Johanna van Polanen 1 August 1403 Breda six children
Engelbert I	1370	1416-1442	3 May 1442	County of Dillenburg	Johanna van Polanen 1 August 1403 Breda six children
John III the Younger	1362	1416-1429/30	1429/30	County of Dillenburg	Unmarried
Judith	c.1380?	1420-1424	2 August 1424	County of Dietz	Godfried VII, Count of Eppstein-Münzenberg 1401 five children	Inherited half of Dietz (the other part was inherited by her uncles) and after her death passed to the Eppstein family. Dillenburg eventually recovered parts of her share of Dietz in 1530.
Dietz annexed to County of Eppstein; Recovered to Nassau-Dillenburg in 1530
Regency of Margaret of Baden-Baden (1426-1433)
John II	1419	1426-1480	9 May 1480	County of Idstein	Maria of Nassau-Breda 17 June 1437 Breda six children
Regency of Elisabeth of Lorraine-Vaudémont (1429–1438)						Sons of Philip I. Philip II was the eldest and received Nassau-Weilburg. Between 1464 and 1490, he also served as regent for count John Louis of Nassau-Saarbrücken, together with Duke Eberhard I of Württemberg, following the death of the count's mother and previous regent. Philip II's younger brother, John, received Saarbrücken in the partitions.
Philip II	12 March 1418	1429-1492	19 March 1492	County of Weilburg	Margaret of Loon-Heinsberg 25 September 1440 two children
Regency of Elisabeth of Lorraine-Vaudémont (1429–1438)
John II	4 April 1423	1429-1472	15 July 1472	County of Saarbrücken	Johanna of Loon-Heinsberg 30 November 1456 two children Elisabeth of Württemberg-Urach 30 October 1470 one child
John IV	1 August 1410	1442-1475	3 February 1475	Barony of Breda	Mary of Looz-Heinsberg 7 February 1440 six children	Sons of Engelbert I, ruled jointly in Breda and Dillenburg until 1447. In this year they divided their lands: John kept Breda and Henry, Dillenburg. After the latter's death, the former reunited their possessions. Their sister Maria inherited some unknown possessions in the Netherlands (possibly in Breda), which she contested with her brother John,^[2] and possibly passed to Nassau-Idstein.
John IV	1 August 1410	1442-1447 1451-1475	3 February 1475	County of Dillenburg	Mary of Looz-Heinsberg 7 February 1440 six children
Henry II	7 July 1414	1443-1447	8 June 1451	Barony of Breda	Genoveva of Virneburg 1435 one child Irmgard of Schleiden-Junkerath after 1437 no children
Henry II	7 July 1414	1443-1451	8 June 1451	County of Dillenburg
Maria	2 February 1418	1443-1472	11 October 1472	Barony of Breda	John II 17 June 1437 Breda six children
Regencies of Elisabeth of Württemberg-Urach and Eberhard I, Duke of Württemberg (1472-1474), and Philip II, Count of Nassau-Weilburg (1474-1490)
John Louis	19 October 1472	1472-1545	4 June 1545	County of Saarbrücken	Elisabeth of Palatinate-Zweibrücken 29 January 1492 Saarbrücken six children Catharina van Meurs-Saarwerden 14 February 1507 nine children
Engelbert II the Valorious	17 May 1451	1475-1504	31 May 1504	Barony of Breda	Cymburgis of Baden-Baden 19 December 1468 Koblenz no children	Children of John IV, divided the land: Engelbert inherited Breda in the Netherlands (with the towns of Lek, Diest, Roosendaal en Nispen, Wouw, and Vianden) and John inherited Dillenburg (with the towns of Dillenburg, Siegen, Hadamar, Herborn, Vianden, Dietz). Engelbert was also Governor of the Habsburg Netherlands, and left no descendants, being succeeded by John's eldest son Henry III.
John V	9 November 1455	1475-1516	30 July 1516	County of Dillenburg	Elisabeth of Hesse-Marburg 11 February 1481 six children
Henry IV	1449	1477-1499	26 May 1499	County of Beilstein	Eva of Sayn 1464 ten children
Philip	1450	1480-1509	16 June 1509	County of Idstein	Margaret of Zweibrücken-Veldenz 1470 no children	Children of John II, divided the land: Philip kept Idstein and Adolph inherited Wiesbaden. Once more, the holder of Wiesbaden reunited the county.
Adolph III	10 November 1443	1480-1511	6 July 1511	County of Idstein (At Wiesbaden 1480-1509)	Margaret of Hanau-Lichtenberg 20 June 1484 four children
Louis I	1473	1492-1523	28 May 1523	County of Weilburg	Maria Margaretha of Nassau-Idstein 19 April 1501 six children
John II	1475	1499-1513	18 August 1513	County of Beilstein	Maria of Solms 1492 four children Anna of Lippe 1510 no children
Henry III	12 January 1483	1504-1538	14 September 1538	Barony of Breda	Louise-Françoise of Savoy 3 August 1503 no children Claudia of Chalon May 1515 one child Mencía de Mendoza 26 June 1524 one child	Son of John V, inherited Nassau-Breda from his uncle Engelbrecht II.
Philip I the Elder	26 April 1492	1511-1554	6 June 1558	County of Idstein	Adriana of Glymes 24 August 1514 Bergen op Zoom six children	Abdicated for his children, who divided the land once more.
John III	17 November 1495	1513-1561	13 December 1561	County of Beilstein	Anna of Nassau-Weilburg 1523 no children	Sons of John II, ruled jointly. They had no descendants and after their death the county was annexed to Nassau-Dillenburg.
Henry V	After 1495	1513-1525	25 February 1525	County of Beilstein	Unmarried
Bernard	1479/85	1513-1556	10 May 1556	County of Beilstein	Unmarried	Brother of John II, ruled jointly with his nephews.
Nassau-Beilstein merged again in Nassau-Dillenburg
William I the Rich	10 April 1487	1516-1559	6 October 1559	County of Dillenburg	Walburga of Egmont 29 October 1519 Koblenz two children Juliana of Stolberg 29 September 1531 Königstein twelve children	Son of John V, inherited Nassau-Dillenburg. During his reign (1530), parts of Judith's half of Dietz are recovered.
Philip III	20 September 1504	1523-1559	4 October 1559	County of Weilburg	Elisabeth of Sayn-Hachenburg 2 March 1523 four children Anna of Mansfeld-Hinterort 23 September 1536 one child Amalia of Isenburg-Büdingen 17 August 1541 Büdingen three children
René	5 February 1519	1538-1544	15 July 1544	Principality of Orange (1530-44) Barony of Breda (1538-44)	Anna of Lorraine 22 August 1540 Bar-le-Duc one child	Son of Henry III, inherited Nassau-Breda from his father and the Principality of Orange from his mother. Left no descendants, and gave his patrimony to his cousin.
William I the Silent	24 April 1533	1544-1584	10 July 1584	Principality of Orange Barony of Breda	Anna van Egmont 8 July 1551 Buren three children Anna of Saxony 24 August 1561 Leipzig (annulled 14 December 1571) five children Charlotte of Bourbon 12 June 1575 Brielle six children Louise de Coligny 12 April 1583 Antwerp one child	Eldest son of William the Rich, inherited his cousin's lands, and left his father's inheritance to his younger brothers. Also Count of Katzenelnbogen, Vianden, Dietz, Buren and Leerdam and Lord of IJsselstein, Baron of Breda, etc. Stadholder of Holland, Zealand and Utrect, etc. Murdered in 1584.
Philip II	25 July 1509	1545-1554	19 June 1554	County of Saarbrücken	Apollonia of Leiningen-Hartenburg 17 July 1535 no children	Left no descendants. He was succeeded by his brother.
John III	5 April 1511	1554-1574	23 November 1574	County of Saarbrücken	Unmarried	Left no descendants. The land was absorbed by Nassau-Weilburg.
Nassau-Saarbrücken merged again in Nassau-Weilburg
Adolph IV	1518	1554-1556	5 January 1556	County of Idstein	Unmarried	Children of Philip I, divided the land. Adolph kept Idstein and Philip inherited Wiesbaden. After Adolph IV's death, Philip II reunited Idstein, but divided it again with another brother, Balthasar.
Philip II the Younger	1516	1554-1566	3 January 1566	County of Idstein (At Wiesbaden 1554-56 and 1564-66)	Unmarried
Albert	26 December 1537	1559-1593	11 November 1593	County of Weilburg (at Ottweiler)	Anna of Nassau-Dillenburg 23 September 1536 fourteen children	Sons of Philip I, ruled jointly. In 1574 annexed Nassau-Saarbrücken
Philip IV	14 October 1542	1559-1602	12 March 1602	County of Weilburg	Erica of Manderscheid-Blankenheim 9 April 1563 one child Elisabeth of Nassau-Dillenburg 3 October 1583 no children
John VI the Elder	22 November 1536	1559-1606	8 October 1606	County of Dillenburg	Elisabeth of Leuchtenberg 6 June 1559 Dillenburg thirteen children Kunigunde Jakobäa of Simmern 13 September 1580 Dillenburg four children Johannetta of Sayn-Wittgenstein 14 June 1586 Berleburg seven children	Younger brother of William the Silent, inherited his father's domains, which were divided after his own death.
Balthasar	1520	1564-1568	11 January 1568	County of Idstein (At Idstein 1564-66)	Margaret of Isenburg-Birstein 9 June/6 September 1564 one child	Brother of Adolph IV and Philip II. Definitely reunited Idstein.
Regency of Margaret of Isenburg-Birstein (1568-1587)
John Louis I	10 April 1567	c.1587-1596	10 June 1596	County of Idstein	Maria of Nassau-Dillenburg 2 December 1588 Idstein six children
Philip William	19 December 1554	1584-1618	20 February 1618	Principality of Orange Barony of Breda	Éléonore de Bourbon 23 November 1606 Fontainebleau no children	Left no descendants. He was succeeded by his half-brother Maurice.
Anna of Nassau-Dillenburg	21 September 1541	1593-1616	12 February 1616	County of Weilburg (at Wehen)	Albert, Count of Nassau-Weilburg 23 September 1536 fourteen children	Widow of Albert of Nassau-Weilburg, inherited the town of Wehen.
John Casimir	24 September 1577	1593-1602	29 March 1602	County of Weilburg (at Ottweiler and Gleiberg)	Elisabeth of Hesse-Darmstadt 10 May 1601 Weilburg one child	Son of Albert, inherited Ottweiler and Gleiberg. After his death his possessions returned to Weilbrug.
Regency of Maria of Nassau-Dillenburg (1596-1605)						Died as minors. After John Louis' death, his lands were annexed to Nassau-Weilburg.
John Philip	26 March 1595	1596-1599	29 August 1599	County of Idstein	Unmarried
John Louis II	21 May 1596	1599-1605	19 June 1605	County of Idstein	Unmarried
Nassau-Idstein merged again in Nassau-Weilburg
Louis II	9 August 1565	1602-1627	8 November 1627	County of Weilburg	Anna Maria of Hesse-Kassel 8 June 1589 Kassel fourteen children	In 1605 reunited all Southern Nassau. However he divided it again after his death between his sons.
William Louis	13 March 1560	1606-1620	13 July 1620	County of Dillenburg	Anna of Orange-Nassau 25 November 1587 Franeker no children	Children of John VI, divided the land: William Louis received Dillenburg, but left no descendants and was succeeded by his brother George; John VII received Siegen, and passed it to his descendants, who divided it once more; George received Beilstein, and reunited it with Dillenburg after William Louis' death, passing both to his descendants; Ernest Casimir received Dietz, and passed it to his descendants; John Louis received Hadamar, and passed it to his descendants.
John VII the Middle	7 June 1561	1606-1623	27 September 1623	County of Siegen	Magdalene of Waldeck-Wildungen 9 December 1581 Dillenburg twelve children Margaret of Schleswig-Holstein-Sonderburg 27 August 1603 Dillenburg thirteen children
George	1 September 1562	1606-1623	9 August 1623	County of Beilstein (1606-23) County of Dillenburg (1620-23)	Anna Amalia van Nassau-Saarbrücken 1584 fourteen children Amalia of Sayn-Wittgenstein 1605 one child
Ernest Casimir	22 December 1573	1606-1632	2 June 1632	County of Dietz	Sophia Hedwig of Brunswick-Lüneburg 8 June 1607 Dillenburg two children
John Louis	6 August 1590	1606-1653	10 March 1653	County of Hadamar (1606-50) Principality of Hadamar (1650-53)	Ursula of Lippe 1617 fourteen children
Elisabeth of Hesse-Darmstadt	29 November 1579	1616-1655	17 July 1655	County of Weilburg (at Wehen)	John Casimir, Count of Nassau-Gleiberg 10 May 1601 Weilburg one child	Widow of John Casimir, inherited from her mother-in-law her seat at Wehen. At her death, Wehen was inherited by Nassau-Idstein.
Maurice	14 November 1567	1618-1625	23 April 1625	Principality of Orange Barony of Breda	Unmarried	Left no descendants. He was succeeded by his half-brother Frederick Henry.
John VIII the Younger	29 September 1583	1623-1638	27 July 1638	County of Siegen (Catholic branch)	Ernestine Yolande de Ligne 13 August 1618 Brussels thirteen children	Sons of John VII, divided the land once more, this time in religious matters: John VIII converted to Catholicism and received the part of the county south of the river Sieg and the original castle in Siegen (which after 1695 was called the "Upper Castle"). John Maurice remained Protestant, and received the part of the county north of the Sieg, and was also governor of Dutch Brazil and later of the Prussian province of Cleves, Mark, and Ravensberg. He also conquered the Freudenberg and Netphen districts from his halfbrother John VIII, but lost them again four years later. Between 1638 and 1674, his brother George Frederick of Nassau-Siegen ruled his part of the country. William received the district of Hilchenbach from John VIII, and also the Ferndorf and Krombach districts 1632-1636. After his own death his districts went back to the Catholic main line.
John Maurice the Brazilian	17 June 1604	1632-1679	20 December 1679	County of Siegen (Protestant branch, 1632-64) Principality of Siegen (Protestant branch, 1664-79)	Unmarried
William	13 August 1592	1624-1642	17 July 1642	County of Siegen (Protestant branch, at Hilchenbach)	Christiane of Erbach 17 January 1619 Siegen seven children
Louis Henry	9 May 1594	1623-1662	12 July 1662	County of Dillenburg (1623-54) Principality of Dillenburg (1654-62)	Catherine of Sayn-Wittgenstein 1615 twelve children Elizabeth of Salm-Dhaun 1653 no children Sophie of Nassau-Hadamar 1656 three children	Sons of George, ruled jointly.
Albert	1 November 1596	1623-1626	16 June 1626	County of Dillenburg	Unmarried	Sons of George, ruled jointly.
Frederick Henry	29 January 1584	1625-1647	14 March 1647	Principality of Orange Barony of Breda	Amalia of Solms-Braunfels 4 April 1625 The Hague nine children
William Louis	18 December 1590	1627-1640	22 August 1640	Nassau-Saarbrücken	Anna Amalia of Baden-Durlach 25 November 1615 Durlach twelve children	Children of Louis II, divided the land: William Louis received Saarbrücken; John received Idstein, and (from 1651) Wiesbaden, Sonnenberg, Wehen, Burg-Schwalbach and Lahr. From 1675 he also served as regent for his nephew, John Ernest of Weilburg. Ernest Casimir received Weilburg.
John	24 November 1603	1627-1677	23 May 1677	County of Idstein	Sibylla Magdalena of Baden-Durlach 6 June 1629 Strasbourg nine children Anna of Leiningen-Dagsburg-Falkenburg 6 December 1646 Strasbourg seventeen children
Ernest Casimir	15 November 1607	1627-1655	16 April 1655	County of Weilburg	Anna Maria of Sayn-Wittgenstein-Hachenburg 22 February 1634 Weilburg six children
Henry Casimir I	21 January 1612	1632-1640	13 July 1640	County of Dietz	Unmarried	Left no descendants. He was succeeded by his brother.
Regency of Ernestine Yolande de Ligne d'Amblise (1638-1651)						Had to cede a part of the County to the Protestant branch of the family in 1648. He kept fighting his Protestant neighbours and suppressing the Calvinists in his territory. His reign was marked by bad management and debts. However, in 1652, he was elevated to Imperial Prince.
John Francis Desideratus	28 July 1627	1638-1699	17 November 1699	County of Siegen (Catholic branch, 1638-52) Principality of Siegen (Catholic branch, 1652-99)	Johanna Claudia of Königsegg-Rotenfels-Aulendorf 14 May 1651 Vienna ten children Marie Eleonore Sophie of Baden-Rodemachern 31 May 1665 Rodemachern four children Isabella Clara du Puget de la Serre 9 February 1669 Brussels ten children
William Frederick	7 August 1613	1640-1664	31 October 1664	County of Dietz (1632-54) Principality of Dietz (1654-64)	Albertine Agnes of Orange-Nassau 2 May 1652 Kleve three children
Regency of Anna Amalia of Baden-Durlach (1638-1642)						Anna Amalia exerted regency of her son Crato, and then took the County of Saarwerden, while regent in the name of her second son in Saarbrucken. After her death, Saarwerden reunited with Saarbrucken. In 1659, John divided the land with his other brothers, in which he received Ottweiler. Count of Nassau-Saarbrücken and (1659–80) in Ottweiler, Jungenheim, and Wöllstein. Between 1677 and 1680 he also served as regent for Count John Ernest of Nassau-Weilburg.
Crato	7 April 1621	1640-1642	25 July 1642	County of Saarbrücken	Unmarried
Anna Amalia of Baden-Durlach	18 December 1590	1642-1651	22 August 1640	Nassau-Saarbrücken (at Saarwerden)	William Louis, Count of Nassau-Saarbrücken 25 November 1615 Durlach twelve children
Regency of Anna Amalia of Baden-Durlach (1642-1651)
John Louis	23 May 1625	1642-1659	9 February 1690	County of Saarbrücken	Dorothea Catherine of Palatinate-Birkenfeld-Bischweiler 6 October 1649 Bischweiler eight children
John Louis	23 May 1625	1659-1690	9 February 1690	County of Ottweiler
William II	27 May 1626	1647-1650	6 November 1650	Principality of Orange Barony of Breda	Mary of Great Britain 2 May 1641 London one child
Mary of Great Britain	4 November 1631	1650-1660	24 December 1660	Barony of Breda	William II 2 May 1641 London one child	Given her inherited seat in Breda, she may have had the entire hereditary barony, which passed then to her son.
Regencies of Mary of Great Britain (1650-1660) and Amalia of Solms-Braunfels (1650-1672)						Became King of England and Scotland (Great Britain) in 1688, jointly with his wife. Left no descendants. He named his cousin John William Friso of Nassau-Dietz as his heir in The Netherlands and the principality of Orange, passing over the claims of the Hohenzollerns of Brandenburg/Prussia.
William III	4 November 1650	1650-1702	8 March 1702	Principality of Orange Barony of Breda (from 1660)	Mary II, Queen of Great Britain 4 November 1677 London no children
Principality of Orange (and Breda) inherited by Nassau-Dietz
In 1702, the Nassau-Dietz branch followed the House of Orange that had become extinct with William III of England (d. 1702). The counts of Nassau-Dietz not only descended from William the Silent's brother, but in female line also from himself, as William Frederick, Prince of Nassau-Dietz, had married Countess Albertine Agnes of Nassau, the fifth daughter of Frederick Henry, Prince of Orange in 1652.
Maurice Henry	23 April 1626	1653-1679	24 January 1679	Principality of Hadamar	Ernestine Charlotte of Nassau-Siegen 30 January 1650 Siegen six children Maria Leopoldine of Nassau-Siegen 12 August 1669 Siegen three children Anna Louise of Manderscheid-Blankenheim 24 October 1675 Hachenburg six children
Frederick	26 April 1640	1655-1675	8 September 1675	County of Weilburg	Christiane Elisabeth von Sayn-Wittgenstein-Homburg 26 May 1663 three children
Gustav Adolph	27 March 1632	1659-1677	9 October 1677	County of Saarbrücken	Eleonore Klara of Hohenlohe-Neuenstein 14 June 1662 seven children	Brothers of John Louis of Nassau-Saarbrücken, divided the land: Gustav kept Saarbrücken, and Waleran inherited Usingen.
Waleran	25 February 1635	1659-1702	17 October 1702	County of Usingen (1659-88) Principality of Usingen (1688-1702)	Catherine Françoise of Croÿ-Roeulx 16 June 1678 Mechelen three children Magdalena Elizabeth of Löwenstein-Wertheim-Rochefort 1686 no children
Henry	28 August 1641	1662-1701	18 April 1701	Principality of Dillenburg	Dorothea Elizabeth of Brzeg 13 October 1663 sixteen children	Grandson of Louis Henry, as son of George Louis, Heir of Nassau-Dillenburg.
Regency of Albertine Agnes of Orange-Nassau (1664-1677)
Henry Casimir II	18 January 1657	1664-1696	25 March 1696	Principality of Dietz	Henriëtte Amalia of Anhalt-Dessau 26 November 1683 Dessau nine children
Regencies of John, Count of Nassau-Idstein (1675-1677) and John Louis, Count of Nassau-Ottweiler (1677-1680)
John Ernest	13 June 1664	1675-1719	27 February 1719	Couny of Weilburg	Maria Polyxena of Leiningen-Dagsburg-Hartenburg 3 April 1683 nine children
Louis Crato	28 March 1663	1677-1713	14 February 1713	County of Saarbrücken	Philippine Henriette of Hohenlohe-Langenburg 25 April 1699 eight children	Left no male descendants. He was succeeded by his brother Charles Louis.
George August	26 February 1665	1677-1721	26 October 1721	County of Idstein (1677-88) Principality of Idstein (1688-1721)	Henriette Dorothea of Oettingen 22 September 1688 Kirchheim unter Teck twelve children
Nassau-Idstein was annexed by Nassau-Saarbrücken
Regency of Francis Bernard of Nassau-Hadamar (1679-1694)						Left no surviving descendants, and his lands were divided by Nassau-Siegen, Nassau-Dillenburg and Nassau-Diez in 1717.
Francis Alexander	27 January 1674	1679-1711	27 May 1711	Principality of Hadamar	Elizabeth Catherine Felicitas of Hesse-Rotenburg 18 October 1695 Lovosice (annulled 1705) fourteen children
Nassau-Hadamar divided between Nassau-Dietz, Nassau-Dillenburg and Nassau-Siegen
William Maurice	18 January 1649	1679-1691	23 January 1691	Principality of Siegen (Protestant branch)	Ernestine Charlotte of Nassau-Schaumburg 6 February 1678 Schaumburg two children
Regency of Ernestine Charlotte of Nassau-Schaumburg (1691-1701)
Frederick William Adolf	20 February 1680	1691-1722	13 February 1722	Principality of Siegen (Protestant branch)	Elisabeth of Hesse-Homburg 7 January 1702 five children Amalie Louise of Courland 13 April 1708 eight children
Regency of Henriëtte Amalia of Anhalt-Dessau (1696-1708)						Became Stadholder in Friesland and Groningen, and in 1702 became the heir of William III and thus the founder of the younger House of Orange-Nassau and of the Dutch Royal Family. However, he had to split the Dutch properties with the King of Prussia who also descended from William I.
John William Friso	14 August 1687	1696-1711	14 July 1711	Principality of Dietz (as Nassau-Dietz, 1696-1702; as Orange-Nassau, 1702-11) Principality of Orange Barony of Breda (as Orange-Nassau, 1702-11)	Marie Louise of Hesse-Kassel 26 April 1709 Kassel two children
William Hyacinth	3 April 1667	1699-1743	18 April 1743	Principality of Siegen (Catholic branch)	Maria Francisca of Fürstenberg-Heiligenberg 9 April 1687 Liège three children Maria Anna of Hohenlohe-Waldenburg-Schillingsfürst 22 May 1698 Frankfurt one child Sophia of Starhemberg 28 July 1740 Vienna no children	Son of John Francis Desideratus. Mismanaged the government of the principality and was removed from executive power 1707-1740. He inherited 1/6 of Nassau-Hadamar in 1711 and 1/2 of Nassau-Dillenburg in 1739. He ceded his part of Nassau-Dillenburg to William IV of Orange-Nassau in 1742 and received the latters part of Nassau-Hadamar in return. He was succeeded by William IV of Orange-Nassau.
William II	28 August 1670	1701-1724	21 September 1724	Principality of Dillenburg	Johanna Dorothea of Schleswig-Holstein-Sonderburg-Plön-Norburg 13 January 1699 Harzgerode two children	Left no surviving descendants. He was succeeded by his brother.
William Henry	2 May 1684	1702-1718	14 February 1718	Principality of Usingen	Charlotte Amalia of Nassau-Dillenburg 15 April 1706 Dillenburg nine children
Regency of Marie Louise of Hesse-Kassel (1711-1729)						Inherited a number of Nassau territories besides his paternal Nassau-Dietz, namely 1/3 of Nassau-Hadamar in 1711, protestant Nassau-Siegen in 1734, and 1/2 of Nassau-Dillenburg in 1739. In 1732, Frederick William I of Prussia left him his Dutch properties, including Huis ten Bosch palace and Het Loo Palace. Ceded his part of Nassau-Hadamar to William Hyacinth of Nassau-Siegen in 1742 and received the latters part of Nassau-Dillenburg. Succeeded William Hyacinth in 1743, and reunited all of the German possessions of the Ottonian Line of his family in his hand, renaming his county into Nassau-Dillenburg, and styling himself Prince of Orange and Nassau. William IV became stadtholder of the Netherlands in 1747.
William IV	1 September 1711	1711-1751	22 October 1751	Principality of Orange (1711-13) Barony of Breda (1711-51) Principality of Dietz (1711-51) (as Orange-Nassau)	Anne of Great Britain 25 March 1734 London three children
In 1713, Orange was annexed to France. From 1713, the use of the title was merely nominal
Charles Louis	6 January 1665	1713-1723	6 December 1723	County of Saarbrücken	Christiane Charlotte of Nassau-Ottweiler 22 April 1713 Saarbrücken two children	Left no descendants. The land went to his cousin from Nassau-Ottweiler.
Charles August	17 September 1685	1719-1753	9 November 1753	County of Weilburg	Auguste Friederike of Nassau-Idstein 17 August 1723 Wiesbaden seven children
Regency of Amalie Louise of Courland (1722-1726)						Left no surviving male descendants. After his death (which determined the extinction of the line) in 1734, Emperor Charles VI transferred the protestant county of Nassau-Siegen to the House of Orange-Nassau as the inheritors.
Frederick William II	11 November 1706	1722-1734	11 November 1734	Principality of Siegen (Protestant branch)	Sophie Polyxena Concordia of Sayn-Wittgenstein-Hohenstein 23 September 1728 five children
Nassau-Siegen was annexed by Nassau-Dillenburg and Nassau-Dietz
Frederick Louis	13 November 1651	1690-1723	25 May 1728	County of Ottweiler	Christiane van Ahlefeldt 28 July 1680 eight children Louise Sophie of Hanau-Lichtenberg 27 September 1697 no children	Count of Nassau-Ottweiler (1680–1728), and in Rixingen (1703–28), and Idstein (1721–1728), and in Wiesbaden, etc. (1723–28). In 1723 inherited Saarbrücken, reuniting Ottweiler with the newly-inherited land. After his death, Saarbrücken briefly mergen with Nassau-Usingen.
Frederick Louis	13 November 1651	1723-1728	25 May 1728	County of Saarbrücken
Nassau-Ottweiler merged again in Nassau-Saarbrücken
Christian	12 August 1688	1724-1739	28 August 1739	Principality of Dillenburg	Isabella Charlotte of Nassau-Dietz 1725 no children	Left no surviving descendants and his lands were inherited by Nassau-Dietz and catholic Nassau-Siegen.
Nassau-Dillenburg was inherited by Orange-Nassau (Nassau-Dietz) and catholic Nassau-Siegen
Regency of Charlotte Amalia of Nassau-Dillenburg (1718-1734)						Sons of William Henry. Charles was the only heir, but in 1741 he divided the inheritance, and gave Saarbrücken to his brother (raised as a principality), and retained Usingen.
Charles	31 December 1712	1718-1741	21 June 1775	Principality of Usingen	Christine Wilhelmine of Saxe-Eisenach 26 December 1734 four children Magdalene Gross of Wiesbaden after 1740 (morganatic) four children
William Henry II	6 March 1718	1741-1768	24 July 1768	Principality of Saarbrücken	Sophie of Erbach-Erbach 28 February 1742 Erbach five children
Regencies of Anne of Great Britain (1751-1759, Marie Louise of Hesse-Kassel (1759-1765), Louis Ernest, Duke of Brunswick-Bevern (1759-1766) and Carolina of Orange-Nassau (1765-1766)
William V	8 March 1748	1751-1806	9 April 1806	Principality of Dietz Barony of Breda (as Orange-Nassau)	Wilhelmina of Prussia I 4 October 1767 Berlin five children
Charles Christian	16 January 1735	1753-1788	28 November 1788	County of Weilburg	Carolina of Orange-Nassau 5 March 1760 The Hague fifteen children Barbara Giessen 2 October 1788 (morganatic) no children
Louis	3 January 1745	1768-1794	2 March 1794	Principality of Saarbrücken	Wilhelmine of Schwarzburg-Rudolstadt 30 October 1766 Schwarzburg one child Katharina Kest 30 October 1766 (morganatic, legitimized 1787) seven children
Charles William	9 November 1735	1775-1803	17 May 1803	Principality of Usingen	Caroline Felizitas of Leiningen-Dagsburg 16 April 1760 one child	Left no descendants. He was succeeded by his brother.
In 1783, the heads of various branches of the House of Nassau sealed the Nassau Family Pact (Erbverein) to regulate future succession in their states, and to establish a dynastic hierarchy whereby the Prince of Orange-Nassau-Dietz was recognised as President of the House of Nassau.^[3]
Henry Louis	9 March 1768	1794-1797	27 April 1797	Principality of Saarbrücken	Marie Françoise Maximilienne of Saint Mauris-Montbarrey 6 October 1785 no children	After his death Nassau-Saarbrücken was occupied by France.
Nassau-Saarbrücken was annexed by France
Frederick Augustus	23 April 1738	1803-1806	24 March 1816	Principality of Usingen	Louise of Waldeck 9 June 1775 seven children	From 1806 ruled jointly. Frederick William retained the title of Prince of Nassau, and Frederick Augustus maintained his title of Duke.
Frederick Augustus	23 April 1738	1806-1816	24 March 1816	Duchy of Nassau	Louise of Waldeck 9 June 1775 seven children
Nassau-Usingen united with Nassau-Weilburg to form the Duchy of Nassau
Frederick William	25 October 1768	1788-1806	9 January 1816	County of Weilburg	Louise Isabelle of Kirchberg 31 July 1788 Hachenburg four children
Frederick William	25 October 1768	1806-1816	9 January 1816	Duchy of Nassau
Nassau-Weilburg united with Nassau-Usingen to form the Duchy of Nassau
William VI	24 August 1772	1806 1813-1815	12 December 1843	Principality of Dietz Barony of Breda (as Orange-Nassau)	Wilhelmina of Prussia II 1 October 1791 Berlin six children Henrietta d'Oultremont 17 February 1841 (morganatic) no children	Ascended 9 April 1806, and on 27 October his lands were annexed to the Duchy of Nassau. He revived the Principality of Orange-Nassau, but in 1815 was proclaimed King of the Netherlands. His Nassau lands returned to the Duchy of Nassau. See List of monarchs of the Netherlands for extended information on the descendants of William.
In 1806 (an then again in 1815), Dietz and Breda were annexed to the Duchy of Nassau
William	14 June 1792	1816-1839	20/30 August 1839	Duchy of Nassau	Louise of Saxe-Hildburghausen 24 June 1814 Weilburg eight children Pauline of Württemberg 23 April 1829 Stuttgart four children
Adolph	24 July 1817	1839-1866	17 November 1905	Duchy of Nassau	Elizabeth Mikhailovna of Russia 31 January 1844 St. Petersburg no children Adelheid-Marie of Anhalt-Dessau 23 April 1851 Dessau five children	In 1866 lost his Nassau lands, but he was granted in 1890 the Grand Duchy of Luxembourg after the death of his cousin without male descendants. See List of monarchs of Luxembourg for extended information on the descendants of Adolph.
In 1866, Nassau was annexed to the Kingdom of Prussia

Nassau's successor states

Kings and Queens of the Netherlands (from the House of Orange-Nassau-Dietz)

Royal Palace of Amsterdam

1815–1840: William I, also Duke and Grand Duke of Luxemburg and Duke of Limburg
1840–1849: William II, also Grand Duke of Luxemburg and Duke of Limburg
1849–1890: William III, also Grand Duke of Luxemburg and Duke of Limburg
1890–1948: Wilhelmina

Following defunct German laws that no longer have relevance due to the end of German nobility, the House of Orange-Nassau(-Dietz) has been extinct since the death of Wilhelmina (1962). Dutch laws and the Dutch nation do not consider it extinct.

1948–1980: Juliana
1980–2013: Beatrix
2013-present: Willem-Alexander

Grand Dukes of Luxembourg (from the House of Nassau-Weilburg)

Grand Ducal Palace, Luxembourg

1890–1905: Adolphe
1905–1912: William IV
1912–1919: Marie-Adélaïde, succession through a female onwards
1919–1964: Charlotte
1964–2000: Jean
2000–present: Henri

References

^ ^a ^b Abramson, Scott F. (2017-01-01). "The Economic Origins of the Territorial State". International Organization. 71 (1): 97–130. doi:10.1017/S0020818316000308. ISSN 0020-8183.
^ (in German) RI XIII H. 5 n. 149 in: Regesta Imperii Online.
^ Hay, Mark Edward (1 June 2016). "The House of Nassau between France and Independence, 1795–1814: Lesser Powers, Strategies of Conflict Resolution, Dynastic Networks". The International History Review. 38 (3): 482–504. doi:10.1080/07075332.2015.1046387.

[:0-1] Abramson, Scott F. (2017-01-01). "The Economic Origins of the Territorial State". International Organization. 71 (1): 97–130. doi:10.1017/S0020818316000308. ISSN 0020-8183.

[2] (in German) RI XIII H. 5 n. 149 in: Regesta Imperii Online.

[Hay2016-3] Hay, Mark Edward (1 June 2016). "The House of Nassau between France and Independence, 1795–1814: Lesser Powers, Strategies of Conflict Resolution, Dynastic Networks". The International History Review. 38 (3): 482–504. doi:10.1080/07075332.2015.1046387.

[1]

[2]

[3]