Nielsen Hayden genealogy
Descendants of William de Beaumont
Father: William de Bellomonte (of Huddersfield, Yorkshire, England - ??)
William de Beaumont
Elizabeth ( - Aft 1193)
   └─ William de Beaumont ( - Abt 1323)
    (Unknown daughter of Richard de Fossato)
       └─ Robert de Beaumont (of Crosland, Yorkshire, England - Aft 1328)
        Agnes de Quernby ( - Aft 1345)(m. Aft 8 Jul 1310)
           ├─ John de Beaumont (of Crossland, Yorkshire, England - Aft 25 Jan 1360) =>
           │ + Margaret ( - Aft 20 Feb 1371)
            + William de Mirfield (Abt 1325 - Aft 4 Mar 1380)(m. Bef 1354)