Isabel Neville, Duchess of Clarence

Lady Isabel Neville (5 September 1451 – 22 December 1476) was the elder daughter and co-heiress of Richard Neville, 16th Earl of Warwick (the Kingmaker of the Wars of the Roses), and Anne de Beauchamp, suo jure 16th Countess of Warwick. She was the wife of George Plantagenet, Duke of Clarence. She was also the elder sister of Anne Neville, wife and consort of Clarence's brother, Richard III.