Nielsen Hayden genealogy
Family: Baldwin III of Hainaut / Yolande von Wassenberg (F1138)
m. Abt 1107Baldwin II of Hainaut (1056-1098) 
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Ida of Louvain ( -1139)
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Ida de Hainaut (1085-1102)  |
| Alix of Hainaut (1097-1154) |
| Gerhard I von Wassenberg (1060-1137) |
| Judith von Wassenberg (1090-1151) |
| Gerhard van Wassenberg (1098- ) |
| Baldwin III of Hainaut (1088-1120)
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| Yolande von Wassenberg (1090-1155)
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| Baldwin IV of Hainaut (1110-1171) |