William was born about 1275 in Yorkshire, England, the son of sir William FitzThomas FitzWilliam and Agnes de Grey.
He died before 1342. The place is not known.
His wife was Isabel Deincourt. They were married, but the date and place have not been found. Their ten known children were Elizabeth (c1328-c1416), sir William (?-1322), John (c1298-1349), Thomas II (c1302->1345), Robert (?-?), Reginald (?-?), Margaret (c1302-?), Joan (?-?), Agnes (?-?) and Isabel (?-?).
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sir William FitzWilliam |
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Agnes de Grey |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | ABT 1275 |
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| Death | BEF 1342 |
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