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 Grey, 1st Earl of Kent Katherine Percy, who was also a great-granddaughter of John of Gaunt by his third wife, Katherine Swynford, and also a descendant of King Edward III of England through his second son, Lionel of Antwerp, 1st Duke of Clarence. After the death of their first son, the second, George, became his heir and eventually George Grey, 2nd Earl of Kent (d. 15 December 1505). Edmund Grey was knighted following service in Aquitaine in October 1440. He attended the royal council between 1456 and 1458. Active militarily in the Wars of the Roses, he especially played a decisive role in the Battle