Duke of Clarence of King Edward IV, in 1461. The Duke forfeited his title in 1478, after he had been convicted of treason against his brother. He allegedly met his end (according to William Shakespeare) by being drowned in a butt of Malmsey. A fourth creation in England was suggested and planned to take effect; the title of Duke of Clarence was going to be given to Lord Guilford Dudley, husband of Lady Jane Grey, upon her coronation, as she declined to make her husband king consort. However, she was deposed before this could take effect. Two double dukedoms, of Clarence and St
Alan III, Duke of Brittany Alan III, Duke of Brittany Alan III of Rennes (997–1 October 1040) (French: Alain III de Bretagne) was Count of Rennes and duke of Brittany, by right of succession from 1008 to his death. He was the son of Duke Geoffrey I and Hawise of Normandy. Alan succeeded his father as Duke of Brittany in 1008. Because he was still a minor at his father's death, his mother acted as regent of Brittany while her brother Richard II, Duke of Normandy assumed guardianship over Brittany. In 1018 Alan married Bertha of Blois, daughter of Odo II, Count of Blois and