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Edmund de Mortimer, 3rd Earl of March and ''jure uxoris'' Earl of Ulster (1 February 1352 – 27 December 1381) was son of Roger Mortimer, 2nd Earl of March, by his wife Philippa, daughter of William Montagu, 1st Earl of Salisbury and Catherine Grandison. ==Early life== An infant at the death of his father, Edmund, as a ward of the crown, was placed by Edward III of England under the care of William of Wykeham and Richard Fitzalan, 10th Earl of Arundel. The position of the young earl, powerful on account of his possessions and hereditary influence in the Welsh marches, was rendered still more important by his marriage on 24 August 1369 at the age of 17 to the 14-year-old Philippa, the only child of the late Lionel of Antwerp, Duke of Clarence, the second son of Edward III. Lionel's late wife, Elizabeth, had been daughter and heiress of William Donn de Burgh, 3rd Earl of Ulster, and Lionel had himself been created Earl of Ulster before his marriage. Edmund inherited the title Earl of Ulster on Lionel's death. Therefore, the Earl of March not only represented one of the chief Anglo-Norman lordships in Ireland in right of his wife Philippa, but Philippa's line was also the second most senior line of descent in the succession to the crown, after Edward, the Black Prince and his son, King Richard II of England. John of Gaunt, younger brother of Prince Edward, had become the 1st Duke of Lancaster and thus the source of the House of Lancaster's claim to the throne. This marriage had, therefore, far-reaching consequences in English history, ultimately giving rise to the claim of the House of York to the crown of England contested in the Wars of the Roses between the Yorks and the Lancasters; Edward IV being descended from the second adult son of Edward III as great-great-grandson of Philippa, countess of March, and in the male line from Edmund of Langley, the first Duke of York and the fourth adult son of Edward III. Edmund Mortimer's son Roger Mortimer, 4th Earl of March would become heir presumptive to the English crown during the reign of Richard II. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Edmund Mortimer, 3rd Earl of March」の詳細全文を読む スポンサード リンク
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