Familie: Robert I (the Frisian), Count of Flanders / Gertrude of Saxony, Countess of Flanders (F500271)
Baldwin V, Count of Flanders (1012-1067) 
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Adèle of France, Countess of Flanders (1009-1079)
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| Bernhard II, Duke of Saxony (995-1059)
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| Eilika of Schweinfurt (1004-1055)
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Ordulf Billung, Duke of Saxony (1022-1072)  |
| Hedwig/Hadwig von Sachsen (Billung) (1030-1112) |
| Robert I (the Frisian), Count of Flanders (1032-1093)
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| Adela (Edel) of Flanders (1064-1115) |