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
House of Tudor royal House of Lancaster. The Tudor family rose to power in the wake of the Wars of the Roses, which left the House of Lancaster, to which the Tudors were aligned, extinct. Henry Tudor was able to establish himself as a candidate not only for traditional Lancastrian supporters, but also for the discontented supporters of their rival House of York, and he rose to the throne by the right of conquest. His victory at the Battle of Bosworth Field was reinforced by his marriage to the English princess Elizabeth of York, daughter of Edward IV, symbolically uniting the former warring