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 was declared illegitimate after her parents' marriage was annulled, Mary was the strongest legitimate claimant. Despite this, Elizabeth would not name Mary her heir; as she had experienced during the reign of her predecessor Mary I, the opposition could flock around the heir if they were disheartened with Elizabeth's rule. Numerous threats to the Tudor line occurred during Elizabeth's reign. In 1569, a group of Earls led by Charles Neville, the sixth Earl of Westmorland, and Thomas Percy, the seventh Earl of Northumberland attempted to depose Elizabeth and replace her with Mary, Queen of Scots. In 1571, the Protestant-turned-Catholic Thomas