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
Hailes Castle in Berwickshire. On 20 December 1451, Sir Patrick Hepburn, 1st Lord Hailes, had a Crown charter of the Lordship of Hailes and other lordships and lands, which his predecessors formerly held in heritage of the Earls of March, who again held them of the Crown in chief; also the lands of Prendergast, above Ayton, and others in the sheriffdom of Berwick, with all rights in the lands formerly held by George Dunbar, Earl of March, and forfeited by him: the whole erected into a free barony to be called the Barony of Hailes. He was one of the conservators of