8th Earl of Glouchester, 7th Earl of Hertford, Chief Guardian of Scotland as the King's Deputy, Captain in Scotland.
Son and heir to Gilbert de Clare and Joan of Acre, grandson of Sir Richard de Clare and Maud de Lacy, King Edward I and Eleanor of Castile. Born at Winchcombe, Gloucestershire.
Husband of Maud de Burgh, daughter of Sir Richard de Burgh Earl of Ulster and Margaret, thought to be the daughter of Arnoul III, Count of Guines. They were married 29 Sept 1308 at Waltham Abbey, and had one son, John, born and died in 1312 at Wales.
Sir Gilbert refused to side with the disputes between his uncle, the king, concerning th eking's favorite, Peter de Gavaston. Ge was made chief Captain on an expedition into Scotland in 1308, but forbidden to tourney in June of 1309 and again in Jan of 1313. In 1310 he accompanied the king to Berwick, appointed Keeper of the Realm during the King's absence to Scotland in 1311. After the murder of Gavaston in 1312, Gilbert and John of Bretagne, the Earl of Richmond tried to make peace between the King and Thomas, the Earl of Lancaster, who had done the deed.
Sir Gilbert was killed at the Battle of Bannockburn in Scotland, while leading a fierce attack against the Scots. He was buried at Tewkesbury Abbey.
John de Clare