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
Kinnitty Castle replaced by the O'Carrolls of Ely and in 1630 William O'Carroll built a new castle close by the old abbey. This castle was confiscated in 1641 as part of the plantation of Offaly, or Kings County as it was then named. In 1664, the crown granted an estate, which included the castle, to Col. Thomas Winter in return for his military service. His descendants sold it to Thomas Bernard, who renamed the house Castle Bernard and left it to his son Thomas Bernard, MP. Several historic features of the original castle remain accessible to visitors. In 1811, Lady Catherine Hutchinson,