Nielsen Hayden genealogy
Descendants of Walter de Grey
- 1267Father: Robert de Grey ( - Between 25 Sep 1240 and 12 Jun 1245)
Mother: Amice
Walter de Grey (of Rotherfield, Oxfordshire, England - 1267)
Isabel de Duston ( - Between 1304 and 1305)
   └─ Robert de Grey (of Rotherfield, Oxfordshire, England - Bef 27 May 1295)
    Joan de Valoines ( - Bef 12 Nov 1312)
       ├─ Thomas de Grey ( - Bef 27 May 1295)
       │ Maud
       │     + Guy le Breton ( - Aft 1346)
       └─ John de Grey (Abt 1272 of Rotherfield, Oxfordshire, England - 17 Oct 1311)
        Margaret de Odingsells (Abt 1277 - Aft 21 Apr 1330 bur.Cogges, Oxfordshire, England)(m. Bef 14 Jan 1297)
           │ + John Ralegh (of Farnborough, Warwickshire, England - Aft 24 Feb 1348)(m. Bef 1302)
           └─ John de Grey (9 Oct 1300 - 1 Sep 1359 Rotherfield, Oxfordshire, England) =>
            + Katherine Fitz Alan (Abt 1300 - Bef 1340 bur.Black Friars, York, Yorkshire, England)
            : (m. Bef 1 Mar 1312)
            : (m. Bef 1 Mar 1312)
            + Avice Marmion ( - Aft 20 Mar 1379)(m. Bef 1341)