William Plantagenet (Warren) 1
- Born: 1166, , , Surrey, Eng
- Marriage: Maud (Matilda) Marshall 1225, Surrey, England
- Died: 27 May 1240, Surry., Eng., at age 74
- Buried: , Lewes, Sussex, England
Ancestral File Number: 8WKJ-QV.
William married Maud (Matilda) Marshall, daughter of William Marshall and Isabel Fitzgilbert De Clare, in 1225 in Surrey, England. (Maud (Matilda) Marshall was born about 1192 in Of, Pembroke, Pembrokeshire, Wales, christened in Sep 1201, died on 27 Mar 1248 and was buried in Tintern Abbey, Chapel Hill, Monmouthshire, England.)