John de Warenne, 6th Earl of Surrey

John de Warenne, 6th Earl of Surrey was a prominent English nobleman and military commander during the reigns of Henry III of England and Edward I of England. During the Second Barons' War he switched sides twice, ending up in support of the king, for whose capture he was present at Lewes in 1264. Warenne was later appointed as "warden of the kingdom and land of Scotland" and featured prominently in Edward I's wars in Scotland.