Cokayne's "Complete Peerage" (Berkeley, pp. 123-124). By 1071, he had been made Provost of the manor of Berkely by WILLIAM FITZOSBERN, to whom it had been granted at the conquest. He took his name from the place. He spent his last two years as a monk.

Berkeley seems to have been retained by the King, Edward the Confessor, and was by him granted at a fee farm rent, equal to £500 17s. 2d. of modern money, to Roger the Lord of Dursley, who was of an old Saxon family said to be allied in blood to the King. At the conquest Roger was permitted by the Norman king to continue to hold Berkeley as before, and it remained in the possession of his son and grandson down to the latter part of the reign of Stephen. From their tenure of the Royal Manor of Berkeley, by far the greater part of their possessions, this family assumed or were known by the name of De Berkeley, which continued to be their patronymic for many generations, until the male line became extinct in 1382. It is necessary to distinguish between these De Berkeleys and the descendants of, Robert the son of Harding the Dane, who afterwards assumed the same name, but who did not possess Berkeley till the beginning of the reign of Henry II.