Nielsen Hayden genealogy
Descendants of Mary
- Aft 1235
Mary
( - Aft 1235)
William de Duston (of Duston, Northamptonshire, England - Bef 31 Aug 1231)
   └─ Isabel de Duston ( - Between 1304 and 1305)
    Walter de Grey (of Rotherfield, Oxfordshire, England - 1267)
       └─ Robert de Grey (of Rotherfield, Oxfordshire, England - Bef 27 May 1295)
        Joan de Valoines ( - Bef 12 Nov 1312)
           │ + Maud
           └─ 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)
            (m. Bef 14 Jan 1297)