William de Warrenne Earl of Warren and Surrey 1033,1871
- Born: 9 Feb 1256 1871
- Marriage (1): Joan de Vere
- Died: 15 Dec 1286, Croydon, London, England at age 30 1871
- Buried: High Altar of Lewes, Reigste, Sussex, England 1872
Noted events in his life were:
• Title. 1871 William was killed in a tournament at Croydon in 1286, predeceasing his father. It has been suggested that this was murder, planned in advance by William's enemies.
On the 5th Earl's death the title went to John, the only son of William. John died without legitimate children, so on his death the title passed to Richard FitzAlan, 10th Earl of Arundel , eldest son of Edmund FitzAlan and John' sister Alice.
William married Joan de Vere, daughter of Robert de Vere and Alice de Sanford. (Joan de Vere was born on 5 Jan 1256 in Oxford, Oxfordshire, England 1873,1874 and died on 21 Nov 1293 in Lewes, Sussex, England 1873,1874.)