Isabel Deincourt

- Aft 25 Jul 1348 (1280–1348)

Parents

• Sir Edmund Deincourt, 1st Lord Deincourt
• Isabel de Mohun

Children

• Sir John FitzWilliam, of Elmley and Sprotborough
• Margaret FitzWilliam
• Joan FitzWilliam

Siblings

• Margaret Willoughby, Lady Willoughby
• John Deincourt