Nielsen Hayden genealogy
Descendants of William de Gresley
- Aft 1220Father: Robert de Gresley ( - Aft 1183)
Mother: Basilia
William de Gresley (of Drakelow, Burton-upon-Trent, Derbyshire, England - Aft Apr 1220)
   └─ Geoffrey de Gresley ( - Aft 1240)
    Margaret de Somerville ( - Bef 1244)(m. Bef 29 Mar 1220)
       └─ William de Gresley ( - 1254)
        Elizabeth Bakepuiz (of Barton Bakepuiz, Derbyshire, England - Aft 1269)(m. Bef 1245)
            + Agnes ( - Aft 1292)