Nielsen Hayden genealogy
Descendants of Arnulf I "The Great"
Abt 885 - 964 (~ 79 years)Father: Baldwin II "The Bald" (Abt 864 - 917 bur.Abbey of Saint-Pierre, Ghent, Flanders)
Mother: Ælfthryth of Wessex (Abt 870 - 7 Jun 929 bur.Abbey of Saint-Pierre, Ghent, Flanders)
Arnulf I "The Great" (Abt 885 - 964 bur.Abbey of Saint-Pierre, Ghent, Flanders)
Adèle de Vermandois (Between 910 and 915 - 958 bur.Abbey of Saint-Pierre, Ghent, Flanders)(m. 922)
   ├─ Hildegard of Flanders ( - 990)
   │ Dirk II ( - 6 May 988)
   │    └─ Arnulf of Ghent (951 Ghent, Flanders - 18 Sep 993 Winkel, West Friesland)
   │     Luitgard of Luxembourg ( - Aft 1005 bur.Egmond Abbey, Bergen, North Holland)(m. May 980)
   │        └─ Dirk III of Friesland (Between 981 and 989 -
   │         27 May 1039 bur.Egmond Abbey, Bergen, North Holland) =>
   │         27 May 1039 bur.Egmond Abbey, Bergen, North Holland) =>
   │         + Othelindis of Nordmark ( - 31 Mar 1044 Saxony)
   └─ Baldwin III (Abt 940 - 961 bur.Abbey of Saint-Bertin, Saint-Omer, Pas-de-Calais, France)
    Mathilde of Saxony ( - 25 May 1009)(m. 961)
       └─ Arnulf II "The Young" ( - 30 Mar 987 bur.Abbey of Saint-Pierre, Ghent, Flanders)
        Rozala of Italy, Queen Consort of France (Between 945 and 955 -
        13 Dec 1003 bur.Abbey of Saint-Pierre, Ghent, Flanders)(m. 968)
        13 Dec 1003 bur.Abbey of Saint-Pierre, Ghent, Flanders)(m. 968)
           └─ Baldwin IV "The Bearded" (980 - 29 May 1035 bur.Abbey of Saint-Pierre, Ghent, Flanders) =>
            + Otgiva of Luxembourg (Abt 995 - 21 Feb 1030)(m. Abt 1005)
            + (Unknown daughter of Richard II, Duke of Normandy) (m. Aft Feb 1030)