Maurice de Berkeley 1243 and, on 14 December 1243, he had livery of his father's lands. He fought in the war in North Wales and in 1264 he joined the Barons against King Henry III. Berkeley died on 4 April 1281 and was buried in St Augustine's Abbey in Bristol. Maurice de Berkeley Sir Maurice de Berkeley "the Resolute" (1218 - 4 April 1281), 5th (feudal) Baron de Berkeley, was an English soldier and rebel, residing at Berkeley Castle in the English county of Gloucestershire. Maurice was born in 1218 to Thomas de Berkeley and Joan de Somery. He married Isabel FitzRoy, the
James Berkeley, 1st Baron Berkeley cousin Elizabeth, daughter of the fifth Baron Berkeley and wife of Richard de Beauchamp, 13th Earl of Warwick. He was unable initially to claim Berkeley Castle, as it was taken in possession by the Earl and Countess of Warwick. In 1421, when the Warwicks finally gave up Berkeley Castle, James was summoned to Parliament by writ as Lord Berkeley. The feud did not end there as his third wife Isabel was captured by the Countess of Warwick's son-in-law the Earl of Shrewsbury, and held imprisoned until her death in 1452. Lord Berkeley was succeeded by his son from his third