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.
Otto III, Duke of Brunswick-Lüneburg heir because his only son had already drowned as a child in the River Ilmenau. Otto had the following children from his marriage to Matilda of Mecklenburg (1293–1358), daughter of Henry II, Lord of Mecklenburg: Otto III, Duke of Brunswick-Lüneburg Otto III, Duke of Brunswick-Lüneburg ( 1296 – 19 August 1352) was Prince of Lüneburg from 1330 to 1352. Otto was born about 1296 as the second son of Otto the Strict and his wife Matilda of Bavaria, and was introduced to the business of government by his father as early as 1314. The stipulation by his father in 1315