Maurice Berkeley, 3rd Baron Berkeley Maurice Berkeley, 3rd Baron Berkeley Maurice Berkeley, "de jure" 3rd Baron Berkeley (1435 – September 1506), of Thornbury in Gloucestershire, "Maurice the Lawyer", was an English nobleman. He was born at Berkeley Castle in Gloucestershire, the younger son of James Berkeley, 1st Baron Berkeley (c. 1394–1463), "James the Just", by his third wife Isabel de Mowbray, and was the younger brother and heir of William Berkeley, 1st Marquess of Berkeley, 2nd Baron Berkeley (1426–1492), "William the Waste-All". Because of his marriage to Isabel Meade, the daughter of a Bristol alderman, who was considered to be below his social status, Maurice
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