Nielsen Hayden genealogy
Descendants of Adelvie de Gant
Adelvie de Gant
Baldwin ( - 1024)
   └─ Eustace I (Abt 995 - Abt 1049)
    Mathilde of Louvain (Abt 993 - ??)
       ├─ Eustache II of Boulogne ( - Abt 1080)
       │ + Godgifu of England (Abt 1010 - Bef 1049)
       │ (Unknown mistress of Eustache II of Boulogne)
       │ :    + Beatrice de Mandeville (of Rycote, Oxfordshire, England - ??)(m. Bef 1084)
       │ St. Ida of Verdun (Abt 1040 - 13 Aug 1113)(m. Bef 1054)
       │     + Mary of Scotland ( - 18 Apr 1118)
       ├─ Lambert II of Boulogne ( - 1054 Phalempin, Nord, France)
       │ Alice of Normandy (Abt 1030 - Bef 1090)(m. 1054)
       │     + Waltheof (1027 of Potton, Bedfordshire, England - 31 May 1076 Winchester, Hampshire, England)
       │     (m. Aft Jan 1070)
       │     (m. Aft Jan 1070)
       └─ Gerberge de Boulogne ( - Aft 1059)
        Frederick of Luxembourg (Abt 1003 - Aft 1035)
            + Walram (Abt 1030 - 1082)