Nielsen Hayden genealogy
Descendants of Richard de Grey
Bef 1200 - Bef 1271 (< 71 years)
Richard de Grey
(Bef 1200 of Codnor, Derbyshire, England - Bef 5 Sep 1271)
Lucy du Hommet (m. Bef 19 Jun 1223)
   ├─ John de Grey (of Codnor, Derbyshire, England - Bef 5 Jan 1272)
   │ Lucy de Mohun ( - Aft 1280)
   │    └─ Henry de Grey (Between 1255 and 1258 of Codnor, Derbyshire, England - Sep 1308)
   │     Eleanor ( - Bef 6 Jun 1301)(m. Bef 1282)
   │     :   └─ Richard de Grey (Abt 1281 of Codnor, Derbyshire, England - Bef 10 Mar 1335) =>
   │     :    + Joan Fitz Payn ( - Aft 10 Mar 1335)
   │     + Joan de Somerville (m. Bef 6 Jun 1301)
   └─ Agnes de Grey
    William fitz Thomas (of Sprotborough, Yorkshire, England - Bef 1295)
       └─ William fitz William (of Sprotborough, Yorkshire, England -
        Between 4 Mar 1339 and 1342 bur.Sprotborough, Yorkshire, England)
        Between 4 Mar 1339 and 1342 bur.Sprotborough, Yorkshire, England)
        Isabel Deincourt ( - Aft 26 Jul 1348 bur.Sprotborough, Yorkshire, England)
           ├─ John Fitzwilliam (of Sprotborough, Yorkshire, England - 10 Aug 1349) =>
           │ + Joan Reresby
            + Adam de Newmarch (of Womersley, Yorkshire, England - Between 1344 and 1352)