(1284-1327) Fourth son of Edward I, he became king in 1307. His reign was marred by continual feuding with his barons because of his relationship with Piers Gaveston, a Gascon noble to whom he gave the earldom of Cornwall, and with another favourite, Hugh Despenser. He suffered a humiliating defeat at the battle of Bannockburn in 1314, and was eventually overthrown by his French wife Isabella and her lover Roger Mortimer. He was murdered at Berkeley Castle.