John I, Count of Nassau-Weilburg

John I of Nassau-Weilburg (1309–1371) was Count of Nassau-Weilburg from 1355 to 1371.

John I was the second son of Count Gerlach I of Nassau-Wiesbaden and Agnes of Hesse, granddaughter of Henry I, Landgrave of Hesse. On Gerlach I abdication in 1346, John and his brothers divided the family lands. John acquired Weilburg on the Lahn.

John was adopted by Emperor Charles IV in 1366 and elevated to Imperial Count. He died on September 20, 1371.

Family and children

John I was married twice. His first marriage in 1333 was to Gertrude of Merenberg (d. 1350), daughter and heiress of Hartrad, the last Lord of Merenberg and Gleiberg. Gertrude died on October 6, 1350 and was buried in Weilburg. The couple had one child, a daughter. She was engaged in 1340 with Reinhard II of Westerburg, but died shortly thereafter.

John I's second marriage in 1353 was to Johanna of Saarbrücken, Dame de Commercy and heiress of Count John II of Saarbrücken. This union produced seven children:

Johanna (1362–1383), married in Kassel in 1377 to Hermann II, Landgrave of Hesse (ca. 1342 – June 10, 1413). Johanna died on January 1, 1383 in Marburg and was buried.
John, and
Johannette (twins, died October 6, 1365).
Agnes (died 1401), married in 1382 to Count Simon III Wecker of Zweibrücken-Bitsch.
Philipp I of Nassau-Weilburg
Schonetta (d. 25 April 1436), married:
1. on 30 June 1384 to Henry X of Homburg;
2. in 1414 to Otto II, Duke of Brunswick-Osterode.
Margarete (d. 22 January 1427), married ca. 1393 to Count Frederick III of Veldenz.

Ancestors

Ancestors of John I, Count of Nassau-Weilburg

16. Henry II of Nassau

8. Walram II of Nassau

17. Matilda of Guelders

4. Adolf of Germany

18. Diether IV of Katzenelnbogen

9. Adelheid of Katzenelnbogen

2. Gerlach I of Nassau-Wiesbaden

20. Henry I of Isenburg-Grenzau

10. Gerlach IV of Isenburg-Limburg

21. Irmingard of Bündingen

5. Imagina of Isenburg-Limburg

22. Henry of Blieskastel

11. Imagina of Blieskastel

23. Agnes of Sayn

1. John I of Nassau-Weilburg

24. Henry II of Brabant

12. Henry I of Hesse

25. Sophie of Thuringia

6. Henry the Younger of Hesse

26. Otto I, Duke of Brunswick-Lüneburg

13. Adelaide of Brunswick

27. Matilda of Brandenburg

3. Agnes of Hesse

28. Otto II Wittelsbach, Duke of Bavaria

14. Louis II, Duke of Bavaria

29. Agnes of the Palatinate

7. Agnes of Bavaria

30. Rudolf I of Germany

15. Matilda of Habsburg

31. Gertrude of Hohenberg

Sources

Dek, Dr. Adriaan Willem Eliza (1970). Genealogie van het vorstenhuis Nassau (Genealogy of the Ruling House of Nassau) (in Dutch). Zaltbommel: Eurpoese Bibliotheek. OCLC 27365371. Archived from the original on 2009-10-26. Retrieved 2009-02-03., p. 25.

John I, Count of Nassau-Weilburg House of Nassau Born: 1309 Died: 20 September 1371
Preceded by Gerlach I	Count of Nassau-Weilburg 1355–1371	Succeeded by Philipp I

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