Nielsen Hayden genealogy
Family: Robert I "The Frisian" / Gertrude of Saxony (F388)
m. 1063Baldwin V (1010-1067) 
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St. Adele of France (1003-1063)
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Baldwin VI (1030-1070)  |
| Matilda of Flanders, Queen Consort of England (1032-1083) |
| Bernard II (995-1059)
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| Eilika of Schweinfurt (1004-1056)
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| Ordulf of Saxony (1020-1072) |
| Robert I "The Frisian" (1035-1093)
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| Gertrude of Saxony (1030-1113)
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| Adele of Flanders (1064-1115) |
| Gertrude of Flanders (1070-1117) |