Nielsen Hayden genealogy
Descendants of William de Grandmesnil
Father: Robert de Grandmesnil ( - Abt 1136)
Mother: Agnes de Bayeux
William de Grandmesnil
   └─ Pernel de Grandmesnil ( - 1 Apr 1212)
    Robert de Breteuil (of Leicester, Leicestershire, England - 1190 bur.Durazzo, Greece)(m. 1155)
       ├─ Margaret of Leicester ( - 12 Jan 1235)
       │ Saher de Quincy (1155 Winchester, Hampshire, England - 3 Nov 1219 Damietta, Egypt)(m. Bef 1173)
       │    ├─ Robert de Quincy ( - Aft 20 May 1217 London, England) =>
       │    │ + Hawise of Chester (1180 - Bef 19 Feb 1243)(m. Between 1197 and 1200)
       │    ├─ Hawise de Quincy ( - Aft 1263 bur.Earl's Colne Priory, Halstead, Great Bromley, Essex, England) =>
       │    │ + Hugh de Vere (Abt 1210 of Castle Hedingham, Essex, England - Bef 23 Dec 1263 bur.Earl's Colne
       │    │ Priory, Halstead, Great Bromley, Essex, England)(m. Aft 11 Feb 1223)
       │    │ Priory, Halstead, Great Bromley, Essex, England)(m. Aft 11 Feb 1223)
       │    │ + Richard de Harcourt (Abt 1202 of Stanton Harcourt, Oxfordshire, England - Abt Jan 1258)
       │    │ (m. Bef 1219)
       │    │ (m. Bef 1219)
       │    ├─ Roger de Quincy (Abt 1195 chr.Brackley, Northamptonshire, England - 25 Apr 1264) =>
       │    │ + Helen of Galloway ( - Aft 21 Nov 1245 bur.Brackley, Northamptonshire, England)
       │    │ + Eleanor de Ferrers ( - Bef 26 Oct 1274)
       │    └─ Robert de Quincy (Bef 1200 of Wakes Colne, Essex, England - Aug 1257) =>
       │     + Ellen of Wales ( - Bef 24 Oct 1253)(m. Bef 5 Dec 1237)
       └─ Amicie de Beaumont ( - 3 Sep 1215)
        Simon IV de Montfort (Abt 1153 - Bef 18 Jul 1188)(m. Bef Jan 1175)
           └─ Simon V de Montfort (Abt 1175 - 25 Jun 1218 Toulouse, Languedoc, France) =>
            + Alix de Montmorency ( - 24 Feb 1221)(m. Abt 1190)