Nielsen Hayden genealogy
Descendants of Isabel Comyn
Father: John Comyn (of Ulceby, Lincolnshire, England - Bef 1321)
Mother: Maud
Isabel Comyn
Thomas Clarell (of Aldwark, Yorkshire, England - Aft 2 Feb 1355)(m. Bef 21 Jun 1335)
   └─ William Clarell (Abt 1340 of Aldwark, Yorkshire, England - Bef 15 Jan 1380)
    Elizabeth de Reygate
       └─ Thomas Clarell (of Aldwark, Yorkshire, England - Between 20 Nov 1441 and 20 Jun 1442)
        Maud Montgomery ( - Bef 17 Mar 1457)
           │ + John Fitzwilliam (27 May 1397 Sprotborough, Yorkshire, England -
           │ : 17 Sep 1421 Rouen, Seine-Maritime, Normandy, France)(m. Aft 19 Jan 1410)
           │ : 17 Sep 1421 Rouen, Seine-Maritime, Normandy, France)(m. Aft 19 Jan 1410)
           │ + Robert Waterton (of Methley, Yorkshire, England - 17 Jan 1425 Methley, Yorkshire, England)(m. 1422)
           │ + William Gascoigne (Abt 1405 of Gawthorpe, Yorkshire, England - Bef Mar 1454)(m. 7 Feb 1426)
            + John Gresley (of Drakelow, Derbyshire, England - 17 Jan 1449)(m. 1409)