Nielsen Hayden genealogy
Descendants of Reginar III "Longneck"
920 - 973 (53 years)Father: Reginar II (Abt 890 Alsace-Lorraine, France - 932 Mons, Hainaut, Belgium)
Reginar III "Longneck" (920 Hainault, Belgium - 973 Bohemia)
Adela ( - 961)
   ├─ Reginar IV (Abt 950 - 1013)
   │ Hedwig of France (Abt 969 - 1013)(m. 996)
   │    ├─ Regnier V ( - Aft 1039)
   │    │ + Mathilde de Verdun ( - Abt 1039)
   │    ├─ Beatrix of Hainaut
   │    │ Ebles I de Roucy (Abt 980 - 11 May 1033)
   │    │    └─ Adele de Roucy (Abt 1014 Roucy, Aisne, Picardy, France - 1062) =>
   │    │     + Hildouin IV de Montdidier (Abt 1005 - 1063)(m. 1031)
   │    └─ Reginar V of Hainaut ( - Aft 1039)
   │     Matilde de Lorraine
   │         + Richilde of Hainaut (Between 1015 and 1020 -
   │         15 Mar 1086 bur.Abbey of Hasnon, Nord-Pas-de-Calais, France)
   │         15 Mar 1086 bur.Abbey of Hasnon, Nord-Pas-de-Calais, France)
   └─ Lambert I "The Bearded" (Abt 950 - 12 Oct 1015)
    Gerberga of Lorraine ( - Aft 1017)(m. Between 985 and 990)
       ├─ Lambert II (Abt 991 of Louvain, Brabant, Belgium - Aft 21 Sep 1062)
       │ Uda of Lorraine
       │    │ + Otto (Abt 1005 - 1067)
       │    └─ Henry II of Louvain (Abt 1021 - Abt 1078 bur.Abbey of Nivelles, Brabant) =>
       │     + Adelheid ( - Aft 1086)
       └─ Mathilde of Louvain (Abt 993 - ??)
        Eustace I (Abt 995 - Abt 1049)
           │ + Godgifu of England (Abt 1010 - Bef 1049)
           │ + (Unknown mistress of Eustache II of Boulogne)
           │ + St. Ida of Verdun (Abt 1040 - 13 Aug 1113)(m. Bef 1054)
           ├─ Lambert II of Boulogne ( - 1054 Phalempin, Nord, France) =>
           │ + Alice of Normandy (Abt 1030 - Bef 1090)(m. 1054)
            + Frederick of Luxembourg (Abt 1003 - Aft 1035)