- Byname:
- Earl Warenne
- Also called:
- (incorrectly) earl of Sussex
- Born:
- c. 1231
- Died:
- September 27, 1304, Kennington, Surrey, England
John de Warenne, 6th earl of Surrey
John de Warenne, 6th earl of Surrey (born c. 1231ādied September 27, 1304, Kennington, Surrey, England) was an eminent English lord during the reigns of Henry III and Edward I of England.
John de Warenne was son and heir of the 5th earl, William de Warenne, and succeeded upon his fatherās death in 1240. (He and his family claimed the earldom of Sussex but never held it de jure.) He married Alice de Lusignan, half sister of Henry III, and, except for a brief period in 1262ā63, he strongly supported his friend the young lord Edward (afterward Edward I) during the Baronsā Wars. In 1264 he defended Rochester Castle against Simon de Montfort until relieved by Edward. They then repaired to Warenneās town of Lewes, where the royal army was defeated (May 1264), and Warenne escaped to France. In 1265 he landed in Pembroke with Henry IIIās half brother William de Valence and took part in the campaign that ended at the Battle of Evesham (August 4, 1265) with Montfortās death.
The successful claim of Warenneās son-in-law John de Balliol to the throne of Scotland gave Surrey a strong interest and a leading part in Scottish affairs. However, after the treaty between Scotland and France in 1295, Edward I invaded Scotland in 1296, and Warenne won the Battle of Dunbar. Edward I then appointed him keeper of the realm of Scotland, but in 1297 he was defeated by William Wallace at Stirling Bridge. He fought in Edwardās later campaigns in Scotland and took part in the victory at Falkirk (1298).