Wilhelm I. von Jülich, Count of Jülich, Duke of Jülich, Earl of Cambridge, was born circa 1299 to Gerhard V. von Jülich (bef1250-1328) and Elisabeth van Aerschot (?-1350) and died 26 February 1361 of unspecified causes. He married Joanna of Hainaut (c1307-1374) 1313 JL in Cologne, Germany. William I of England (1027-1087), Charlemagne (747-814), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s, Rollo of Normandy (860-932)/s.


Offspring of Wilhelm I. von Jülich and Joanna of Hainaut (c1307-1374)
Name Birth Death Joined with
Richardis von Jülich (1314-1360)
Gerhard VI. von Berg (?-1360) 18 May 1360 Margarete von Ravensberg-Berg (c1320-1389)
Philippa von Jülich (1328-1390) 1328 1390 Gottfried von Heinsberg (1325-1395)
Johanna von Jülich (1330-1359) 1359 Wilhelm I. von Isenburg-Wied (-1383)
Wilhelm II. von Jülich (c1325-1393) 1327 13 December 1393 Maria van Gelre (c1328-1397)
Elisabeth von Jülich (?-1411) 1335 6 June 1411 John Plantagenet, 3rd Earl of Kent (1330-1352)
Eustache d'Aubrécicourt (-aft1371)

Wilhelm I. von Jülich (c1299-1361)
House of Jülich
Born: c.  1299 Died: 25/26 February 1361
Preceded by
Gerhard V
Count of Jülich
Duke of Jülich
(since 1356)

Succeeded by
William II

Footnotes (including sources)