Nielsen Hayden genealogy
Descendants of Hildegard of Flanders
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Father: Arnulf I "The Great"
(Abt 885 - 964 bur.Abbey of Saint-Pierre, Ghent, Flanders)
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Mother: Adèle de Vermandois
(Between 910 and 915 - 958 bur.Abbey of Saint-Pierre, Ghent, Flanders)
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Hildegard of Flanders ( - 990)
   
Luitgard of Luxembourg
( - Aft 1005 bur.Egmond Abbey, Bergen, North Holland)(m. May 980)
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       └─ Dirk III of Friesland
(Between 981 and 989 - 27 May 1039 bur.Egmond Abbey, Bergen, North Holland)
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           └─ Floris I of Holland
(Abt 1017 Vlaardingen, Zuid-Holland, Netherlands -
            28 Jun 1061 Gelderland, Netherlands) =>
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            28 Jun 1061 Gelderland, Netherlands) =>
            + Gertrude of Saxony
(Abt 1030 - 4 Aug 1113)(m. Abt 1050)
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