John de Warenne, 6th Earl of Surrey

John de Warenne, 6th Earl of Surrey (1231–1304), was an English commander under Henry III and Edward I. In 1247 he married Henry III's half-sister Alice of Lusignan. In the Second Barons' War he changed sides twice, fighting for the king at Lewes in 1264 and Evesham in 1265; after Lewes he fled to the Continent before his confiscated estates were restored.

After the Welsh campaigns of 1277–1283, Edward I made him warden of Scotland. He commanded at Dunbar in 1296 but was routed by William Wallace at Stirling Bridge in 1297 and fought at Falkirk in 1298. He died on 27 September 1304, leaving the earldom to his grandson.