Issue of Edward III of England – 3 February 1399), 1st Duke of Lancaster, fourth son. From the marriage of John of Gaunt and Blanche of Lancaster, daughter and heiress of the Duke of Lancaster, descended legitimate male heirs, the Lancasters (King Henry IV (1399-1413), who as Henry of Bolingbroke in 1399 deposed his first cousin King Richard II (1377-1399), and was followed by his son King Henry V(1413-1422) and the latter's son King Henry VI (1422-1471). This line ended in 1471 when King Henry VI's son Edward of Westminster, Prince of Wales was killed at the Battle of Tewkesbury and when he himself was deposed
Hugh Courtenay (d.1471) Hugh Courtenay (d.1471) Sir Hugh Courtenay (c.1427 – 6 May 1471) of Boconnoc, Cornwall, was MP for Cornwall in 1446 and 1449. He was beheaded after the Battle of Tewkesbury in 1471. He was the second son of Sir Hugh Courtenay (c.1358-1425), of Haccombe and Bampton, Devon, MP and Sheriff of Devon (a grandson of Hugh de Courtenay, 2nd/10th Earl of Devon (1303–1377) and the younger brother of Edward de Courtenay, 3rd/11th Earl of Devon (1357–1419), "The Blind Earl"), by his 4th wife Maud Beaumont (d. 3 July 1467), daughter of Sir William Beaumont of Shirwell by Isabel Willington, daughter