Maurice de Berkeley 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 daughter of Richard FitzRoy, Baron of Chilham (an illegitimate son of King John of England) and Rose de Douvres, sometime before 12 July 1247. Berkeley fought in the French Wars and was invested as a knight before 1242. He inherited the title of Baron de Berkeley in
Baron Berkeley that the barony by writ was deemed, extraordinarily, to be in effect a feudal barony (or barony by tenure), dependent on the tenure of Berkeley Castle. Thus when William Berkeley, 1st Marquess of Berkeley, 2nd Baron Berkeley (1426–1492), "William the Waste-All", alienated Berkeley Castle to the king, he effectively disinherited his younger brother from the barony by writ. The heir apparent is his son the Hon. Thomas FitzHardinge Gueterbock (b. 1969) The Earldom of Berkeley, together with the Viscountcy Dursley, was separated from the barony in 1882, but the accession was not fully established. In 1942 both titles became extinct