Nielsen Hayden genealogy
Descendants of Isabel fitz John
Father: John fitz Geoffrey (Abt 1205 of Shere, Surrey, England - 23 Nov 1258)
Mother: Isabel le Bigod
Isabel fitz John
Robert de Vipont (Abt 1234 of Appleby, Westmorland, England - Bef 7 Jun 1264)(m. Aft 19 Nov 1242)
   └─ Isabel de Vipont (Abt 1248 of Appleby, Westmorland, England - 1291 bur.Shap Abbey, Westmorland, England)
    Roger de Clifford (Abt 1242 of Appleby, Westmorland, England - 6 Nov 1282 Moel-y-Don, Wales)
    (m. Aft 28 Jun 1265)
    (m. Aft 28 Jun 1265)
       └─ Robert de Clifford (Abt 1 Apr 1274 - 24 Jun 1314 Bannockburn, Stirlingshire, Scotland)
        Maud de Clare ( - 1 Feb 1325)(m. 13 Nov 1295)
           ├─ Idoine de Clifford (of Appleby, Westmorland, England -
           │ 24 Aug 1365 bur.Beverley Minster, Yorkshire, England) =>
           │ 24 Aug 1365 bur.Beverley Minster, Yorkshire, England) =>
           │ + Henry de Percy (1299 - 26 Feb 1352 Warkworth, Northumberland, England)(m. Abt 1318)
           │ + Peter de Mauley (Abt 1300 of Mulgrave, Yorkshire, England - 18 Jan 1355)(m. Bef 16 Apr 1322)
           └─ Robert de Clifford (5 Nov 1305 of Appleby, Westmorland, England -
            20 May 1344 bur.Shap Abbey, Westmorland, England) =>
            20 May 1344 bur.Shap Abbey, Westmorland, England) =>
            + Isabel de Berkeley ( - 25 Jul 1362)
            (m. Jun 1328 Berkeley Castle, Berkeley, Gloucestershire, England)
            (m. Jun 1328 Berkeley Castle, Berkeley, Gloucestershire, England)