Nielsen Hayden genealogy
Descendants of William de Curcy
Abt 1130 - 1162 (~ 32 years)
William de Curcy
(Abt 1130 - 1162)
Maud d'Avranches ( - 21 Sep 1173)(m. Abt 1155)
   └─ Hawise de Courcy (Abt 1157 of Okehampton, Devon, England - 31 Jul 1219 bur.Ford Abbey, Dorset, England)
    Reynold de Courtenay (Abt 1150 of Okehampton, Devon, England - 27 Sep 1194 bur.Ford Abbey, Dorset, England)
    (m. Between 1173 and 1178)
    (m. Between 1173 and 1178)
       └─ Robert de Courtenay (Abt 1183 of Okehampton, Devon, England - 26 Jul 1242 Iwerne, Dorset, England)
        Mary de Revières ( - Aft 12 Nov 1242)(m. Between 1210 and 1211)
           ├─ Hawise de Courtenay (of Okehampton, Devon, England - Bef 8 Apr 1269) =>
           │ + John de Neville (of Little Hallingbury, Essex, England -
           │ : Bef 8 Jun 1246 bur.Waltham Abbey, Essex, England)(m. Bef 15 Feb 1230)
           │ : Bef 8 Jun 1246 bur.Waltham Abbey, Essex, England)(m. Bef 15 Feb 1230)
           │ + John de Gatesden (of Broadwater, Sussex, England - Bef 17 Oct 1262)(m. Bef 12 Apr 1254)
           └─ John de Courtenay (of Okehampton, Devon, England - 3 May 1274 bur.Ford Abbey, Dorset, England) =>
            + Isabel de Vere ( - Bef 7 Jan 1291 bur.Cowick Priory, Exeter, Devon, England)(m. Aft 6 Oct 1240)