Early Life
William FitzThomas was probably born in the 1230s. His parents were
Thomas FitzWilliam and
Agnes Bertram.
Family Life
William married
Agnes Metham, daughter of
Sir John Metham (the two places I have seen this mentioned is in
Baildon1 and in
Extinct Northern Peerages3).
Stemmata2 suggests that William married twice, first to Agnes Grey, daughter of Richard Grey, Lord Grey of Codron (as also stated in
Burke's Peerage, but not in
Burke's Extinct Peerage) and secondly to Agnes Metham, but that the marriage with Agnes Metham had no issue.
On this issue, there's a salient post at
soc.genealogy.medieval from
John P Ravilious on the 30th May 2007:
In reviewing possible evidence concerning the FitzWilliams and a long alleged Metham marriage, I found the charter of William fitz William (1331) to Hanepole priory to be interesting initially in that the abbreviated witness list includes "domino Johanne de Eland, Rogero de Novo-mercato, Thoma de Metham, militibus, &c." .
Also interesting, the portion of this charter confirming a grant by the first William fitz William, son of Aubrey de Lisours (and great-grandfather of the grantor in 1331), mentions the confirmation by that William of his mother's grant of the church of Athewyks, and of annual of rents from Plumtree for use in maintaining the supply of oil for lamps to light the area around the tomb of his late wife Matilda, or Maud: "Insuper inspexi cartam Willielmi filii Willielmi, filii et haeredis praedictae Albredae de Lisours, testantem quod idem Willielmus filius Willielmi confirmavit donationem matris suae Albredae,..... ad oleum emendum, ut lampas una, nocte dieque indesinenter sit ardens ad tumbam Matildis quondam uxoris suae."
Death
He was dead in 1294 when his will was proved.
Footnotes
[1] Baildon and the Baildons, a History of a Yorkshire Manor and Family, by W Paley Baildon, Volume 1, page 353
[2] Stemmata Robertson et Durdin, by Herbert Robertson, London 1893-95, page 156
[3] FitzWilliam, p76; Extinct and Dormant Peerages of the Northern Counties of England, John William Clay, London (1913)