Nielsen Hayden genealogy
Family: Godfrey I of Brabant / (Unknown mistress of Godfrey of Brabant) (F1521)
Henry II of Louvain (1021-1078) 
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Adelheid ( -1087)
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Henry III of Louvain ( -1095)  |
| Ida of Louvain ( -1139) |
| Godfrey I of Brabant (1060-1139)
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| Joscelin of Louvain ( -1180) |