William de Berkeley, 1st Marquess of Berkeley William de Berkeley, 1st Marquess of Berkeley William de Berkeley, 1st Marquess of Berkeley (1426 – 14 February 1492) was an English peer, given the epithet "The Waste-All" by the family biographer and steward John Smyth of Nibley. He was buried at "St. Augustine's Friars, London" according to one source, but most likely in the Berkeley family foundation of St Augustine's Abbey, Bristol. William of Berkley was born to James Berkeley, 1st Baron Berkeley, and Lady Isabel Mowbray at Berkeley Castle in Berkeley, Gloucestershire, in 1426. His first marriage was in 1466 to Elizabeth West, daughter of Reginald West, 6th
Baron Berkeley Berkeley" held extensive lands in-chief of the king in 1086, as recorded by Domesday Book, including Dursley and retired as a monk to St Peter's Abbey, Gloucester in about 1091. His son Roger II (d. about 1131) and grandson Roger III (d. after 1177) also held the manor of Dursley in-chief of the king. In 1152 Roger III was deprived of the farm of Berkeley during the civil war between King Stephen and the Empress Maud. He was later restored to Dursley, and founded the family of "Berkeley of Dursley", but Berkeley Castle was granted by barony to Robert FitzHarding,