Nielsen Hayden genealogy
Descendants of Cecily le Bigod
Father: Roger I le Bigod (Abt 1045 - 8 Sep 1107 Earsham, Norfolk, England)
Mother: Adeliza de Tosny ( - Aft 1136)
Cecily le Bigod
William "Brito" d'Aubeney (of Belvoir, Leicestershire, England - Aft 1130)
   └─ William II d'Aubeney (of Belvoir, Leicestershire, England - 1167)
    Maud de Senlis (Abt 1125 - Aft 1185)
       ├─ Maud d'Aubigny ( - Aft 1209)
       │ Gilbert of Strathearn (Bef 1151 - 1223)
       │    └─ Robert of Strathearn ( - Between 25 Sep 1237 and 1244) =>
       │     +
       └─ William III d'Aubeney (Aft 1146 of Belvoir, Leicestershire, England -
        7 May 1236 bur.Newstead, Lincolnshire, England)
        7 May 1236 bur.Newstead, Lincolnshire, England)
        Margary de Umfreville ( - Bef 1198)
           └─ William IV d'Aubeney (of Belvoir, Leicestershire, England -
            4 Sep 1242 bur.Beauvoir Priory, Leicestershire, England) =>
            4 Sep 1242 bur.Beauvoir Priory, Leicestershire, England) =>
            + Isabel ( - Aft 1285)