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
England in the Late Middle Ages English heir in her power, Isabella refused to return to England unless Edward II dismissed his favourites and also formed a relationship with Roger Mortimer, 1st Earl of March. The couple invaded England and, joined by Henry, 3rd Earl of Lancaster, captured the king. Edward II abdicated on the condition that his son would inherit the throne rather than Mortimer. He is generally believed to have been murdered at Berkeley Castle by having a red-hot poker thrust into his bowels. In 1330 a coup by Edward III ended four years of control by Isabella and Mortimer. Mortimer was executed, but