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
Baron Berkeley Berkeley" held extensive lands in-chief of the king in 1086, as recorded by Domesday Book, including Dursley and retired as a monk to St Peter's Abbey, Gloucester in about 1091. His son Roger II (d. about 1131) and grandson Roger III (d. after 1177) also held the manor of Dursley in-chief of the king. In 1152 Roger III was deprived of the farm of Berkeley during the civil war between King Stephen and the Empress Maud. He was later restored to Dursley, and founded the family of "Berkeley of Dursley", but Berkeley Castle was granted by barony to Robert FitzHarding,