John I, Count of Nassau-Dillenburg

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John I, Count of Nassau-Dillenburg
Bornc. 1340
Died4 September 1416(1416-09-04) (aged 75–76)
Noble familyHouse of Nassau
Spouse(s)Margareta of the Marck
FatherOtto II of Nassau
MotherAleyda of Vianden

John I, Count of Nassau-Dillenburg (German: Johann I. von Nassau-Dillenburg, Dutch: Jan I van Nassau-Dillenburg; c. 1340 – 4 September 1416, Keppel) was a Count of Nassau in Siegen and Dillenburg, both now in Germany. He was a son of Count Otto II of Nassau and Adelheid or Aleyda,[1] Countess of Vianden.[2]

John of Nassau married Margareta of the Marck on 30 November 1357. She was the daughter of Adolph II of the Marck and Margareta of Cleves. The dowry for this marriage was paid by Margareta's brother Engelbert of the Marck according to a charter from 1369.[3] Their children include:

After the death of Count John I in 1416 his lands were not divided, but instead overseen by all four of his surviving sons Adolf, John II, Engelbert I and John III.[4]


  1. ^ Aleyda was a diminutive of Adelheid
  2. ^ De Nederlandsche leeuw: Maandblad van het Koninklijk Nederlandsch Genootschap voor Geslacht- en Wapenkunde, Volume 8, 1890, pg 90-91
  3. ^ Niederrheins Urkundenbuch, Band III, 707, p. 605. via Cawley, Charles, Counts of Nassau, Medieval Lands database, Foundation for Medieval Genealogy,[self-published source][better source needed]
  4. ^ Frdr. D. v Schütz, Geschichte des Herzogthums Nassau, W. Roth, 1853, pp 68-72 Google Books