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
Tudors of Penmynydd lineage, the Griffiths of Penrhyn, whose head, Gwilym ap Griffith, had married their niece, Morfydd ferch Goronwy. The family is best known due to the descendants of a younger son. Owain Tudur (anglicised to "Owen Tudor"), the son of rebel Maredudd ap Tudor, would become a courtier, and secretly married Catherine of Valois, widowed Queen Consort of the Lancastrian King Henry V. Owen Tudor and Catherine of Valois had two sons, Edmund Tudor, 1st Earl of Richmond (d. 1456), and Jasper Tudor, Duke of Bedford and Earl of Pembroke (d. 1495). Edmund Tudor was betrothed and married to Margaret Beaufort