House of Tudor Richmond on 15 December 1449 and was married to Lady Margaret Beaufort, the great-granddaughter of John of Gaunt, the progenitor of the house of Lancaster; Jasper became the first Earl of Pembroke on 23 November 1452. Edmund died on 3 November 1456. On 28 January 1457, his widow Margaret, who had just attained her fourteenth birthday, gave birth to a son, Henry Tudor, at her brother-in-law's Pembroke Castle. Henry Tudor, the future Henry VII, spent his childhood at Raglan Castle, the home of William Herbert, 1st Earl of Pembroke, a leading Yorkist. Following the murder of Henry VI and death
Edmund Tudor, 1st Earl of Richmond York, with resultant hostility, it left both the Tudor brothers in a quandary. On 22 May 1455, Edmund was not present when the Wars of the Roses began with the First Battle of St Albans where Henry was captured by the forces of Richard of York. Both brothers attended the following Parliament where York was once again named Protector of England. While York cancelled the majority of the grants Henry had made during his reign, those to Edmund and Jasper were exempt. Both brothers were absent from the second session of Parliament that year when it began on 12 November;