and the Wars of the Roses Sources: Henry Tudor had, however, something that the others did not. He had an army which defeated the last Yorkist king, Richard III, in the field of battle and the support of powerful nobles to take the crown by right of conquest. How Richard III had come to the throne proved controversial, even among powerful Yorkists. Henry Tudor, as Henry VII, and his son by Elizabeth of York, Henry VIII, eliminated other claimants to the throne, including his first cousin once removed, Margaret Pole, Countess of Salisbury, and her family. Only Reginald Pole survived, but he was a cardinal in the Catholic Church, with no heirs. He later became Archbishop of Canterbury under Henry VIII's Catholic daughter, Mary I. On 1 November 1455, John Beaufort's granddaughter, Margaret Beaufort, Countess of Richmond and Derby, married Henry VI's maternal half-brother Edmund Tudor, 1st Earl of Richmond. It was his father, Owen Tudor (), who abandoned the Welsh patronymic naming practice and adopted a fixed surname. When he did, he did not choose, as was generally the custom, his father's name, Maredudd, but chose that of his grandfather, Tudur ap Goronwy, instead. This name is sometimes given as Tewdwr, the Welsh form of Theodore, but Modern Welsh Tudur, Old Welsh Tutir is originally not a variant but a different and completely unrelated name, etymologically identical with Gaulish Toutorix, from Proto-Celtic *toutā "people, tribe" and *rīxs "king" (compare Modern Welsh tud "territory" and rhi "king" respectively), corresponding to Germanic Theodoric. Owen Tudor was one of the bodyguards for the queen dowager Catherine of Valois, whose husband, Henry V, had died in 1422. Evidence suggests that the two were secretly married in 1429. The two sons born of the marriage, Edmund and Jasper, were among the most loyal supporters of the House of Lancaster in its struggle against the House of York. Henry VI ennobled his half-brothers: Edmund became Earl of 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 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,