Earl of Salisbury later by Richard Neville "the Kingmaker", upon whose death the title went into abeyance because multiple individuals were entitled to inherit it. Then, in 1472, it was granted to George, Duke of Clarence, who was married to Warwick's eldest daughter. When the Duke of Clarence was executed in 1478 for treason (supposedly by being drowned in a vat of Malmsey wine), the title was forfeit. It was then granted to Edward of Middleham (who was his nephew via the Duke's brother Richard), who died in 1484 at the age of 11. It was restored to two of George of Clarence's
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