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
Maurice de Berkeley, 2nd Baron Berkeley his wife he had children including: His second marriage, in about 1316, was to Isabella de Clare, daughter of Gilbert de Clare, 6th Earl of Hertford by his wife Alice de Lusignan. Berkeley was imprisoned by the Despencers in Wallingford Castle in Berkshire (now in Oxfordshire), where he died on 31 May 1326 and was eventually buried in St Augustine's Abbey (now Bristol Cathedral) in Bristol, founded by his ancestor. He was succeeded by his eldest son Thomas de Berkeley, 3rd Baron Berkeley (born c. 1296). Maurice de Berkeley, 2nd Baron Berkeley Maurice de Berkeley, 2nd Baron Berkeley (April 1271