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
Kenilworth Castle of the Midlands, in an area that held several nobles who still supported Edward and were believed to be trying to rescue him. Henry's loyalty was also coming under question. In due course, Isabella and Mortimer had Edward moved by night to Berkeley Castle, where he died shortly afterwards. Isabella continued to use Kenilworth as a royal castle until her fall from power in 1330. Henry of Grosmont, the Duke of Lancaster, inherited the castle from his father in 1345 and remodelled the great hall with a grander interior and roof. On his death Blanche of Lancaster inherited the castle.