Nielsen Hayden genealogy
Family: Henry III of Louvain / Gertrude of Flanders (F1502)
m. Abt 1090Henry II of Louvain (1021-1078) 
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Adelheid ( -1087)
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Ida of Louvain ( -1139)  |
| Godfrey I of Brabant (1060-1139) |
| Robert I "The Frisian" (1035-1093)
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| Gertrude of Saxony (1030-1113)
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| Adele of Flanders (1064-1115) |
| Henry III of Louvain ( -1095)
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| Gertrude of Flanders (1070-1117)
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| Adelaide of Louvain ( -1158) |