Nielsen Hayden genealogy
Family: Wilhelm V-I / Johanna of Holland and Hainault (F14715)
m. 26 Feb 1324Gerhard V (1250-1328) 
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| William III of Hainault (1286-1337)
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Jeanne de Valois (1294-1342)
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Margareta of Hainault (1310-1356)  |
| Philippa of Hainault, Queen Consort of England (1314-1359) |
| Wilhelm V-I (1299-1361)
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| Johanna of Holland and Hainault (1312-1374)
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| Gerhard VI of Jülich ( -1360) |
| Wilhelm VI-II (1333-1393) |