Nielsen Hayden genealogy
Descendants of Sibyl de Ferrers
Father: William de Ferrers ( - 22 Sep 1247)
Mother: Agnes of Chester ( - 2 Nov 1247)
Sibyl de Ferrers
John de Vipont (1210 of Appleby, Westmorland, England - Bef 25 Jul 1241)
   └─ Robert de Vipont (Abt 1234 of Appleby, Westmorland, England - Bef 7 Jun 1264)
    Isabel fitz John (m. Aft 19 Nov 1242)
       └─ Isabel de Vipont (Abt 1248 of Appleby, Westmorland, England -
        1291 bur.Shap Abbey, 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)