Edward IV of England Richard, Duke of Gloucester (later King Richard III of England), were married to Isabel Neville and Anne Neville. Both were daughters of Warwick by Anne Beauchamp and rival heirs to the considerable inheritance of their still-living mother, leading to a dispute between the brothers. In 1478 George was eventually found guilty of plotting against Edward, imprisoned in the Tower of London, and privately executed on 18 February 1478. According to a long-standing tradition, he was "drowned in a butt of Malmsey wine". Edward did not face any further rebellions after his restoration, as the Lancastrian line had virtually been extinguished.
Edmund de la Pole, 3rd Duke of Suffolk Edmund de la Pole, 3rd Duke of Suffolk Edmund de la Pole, 3rd Duke of Suffolk, 6th Earl of Suffolk, (c. 1471 – 30 April 1513), Duke of Suffolk, was a son of John de la Pole, 2nd Duke of Suffolk and his wife Elizabeth of York. His mother was the second surviving daughter of Richard Plantagenet, 3rd Duke of York, and Cecily Neville. She was also a younger sister to Edward IV of England and Edmund, Earl of Rutland, as well as an older sister to Margaret of York, George Plantagenet, 1st Duke of Clarence, and Richard III of