Nielsen Hayden genealogy
Family: Gerhard VI of Jülich / Margareta (F12479)
m. 1338Wilhelm V-I (1299-1361) 
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Johanna of Holland and Hainault (1312-1374)
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Wilhelm VI-II (1333-1393)  |
| Otto IV ( -1328)
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| Margareta von Berg (1288-1341)
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| Gerhard VI of Jülich ( -1360)
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| Margareta ( -1389)
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| Wilhelm II-VII of Jülich (1348-1408) |
| Margarete of Ravensberg (1350-1425) |