Nielsen Hayden genealogy
Descendants of Thomas de Greystoke
Father: Thomas fitz William (Abt 1198 Greystoke, Penrith, Cumberland, England - 1246)
Mother: Christian de Vipont (of Appleby, Westmorland, England - ??)
Thomas de Greystoke
   └─ Elizabeth de Greystoke (Abt 1265 - Aft 1328)
    Thomas de Pickering ( - Aft Jul 1336)
       └─ Robert de Pickering (Bef 1290 - Aft Nov 1351)
        Maud (m. Bef 4 Feb 1332)
           └─ James Pickering, Speaker of the House of Commons (Abt 1332 - 1398) =>
            + Agnes