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 each baron were coined by John Smith of Nibley (d.1641), steward of the Berkeley estates, the biographer of the family and author of "Lives of the Berkeleys". The feudal barony of Berkeley was created "circa" 1155, when King Henry II granted the royal castle of Berkeley to the Anglo-Saxon royal financier Robert Fitzharding under the feudal land tenure "per baroniam". Prior to that time Berkeley Castle had been held in fee-farm by Roger I "de Berkeley" (d.1093), a Norman nobleman, possibly a son of Roger I of Tosny (died circa 1040), who acquired the surname "de Berkeley". Roger I "de