||Roger III (Mortimer) de Mortimer was a member of aristocracy in the British Isles.|
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Sir Roger de Mortimer was a famous and honoured knight from Wigmore Castle in Herefordshire, and a loyal ally of King Henry III of England. He was at times an enemy, at times an ally, of the Welsh prince, Llywelyn the Last.
Roger was the son and heir of Ralph de Mortimer and Gladys (Gladusa) Duy (or Dark-eyed), daughter of Llewelyn ap Jorworth, by his second wife, Joan (the illegitimate daughter of King John), and widow of Reynold de Braose (d. June 1228). Roger was likely born at his father's castle of Cwmaron. He was a minor when his father died on 6 Aug 1246 and had "livery of his inheritance" on 26 Feb 1246/7. In 1253, he was made a knight by the King at Winchester. Roger served in Gascony in 1253 and 1254.
In 1255/56 Roger went to war with his cousin, Llywelyn ap Gruffydd, when the latter invaded his lordship of Gwrtheyrnion or Rhayader. This war would continue intermittently until the death of both Roger and Llywelyn in 1282. They were both grandsons of Llywelyn ab Iorwerth.
From 1255 to 1264, Roger was "chiefly occupied with his duties on the March" in opposition to Llywelyn. He was involved in the disputes between the King and the Barons in 1258, at first siding with the Barons, but by Apr 1259, he had been "sworn of the Kings Council". On 19 May 1260 the Council of Magnates appointed Sir Roger Mortimer constable of Hereford Castle. Roger arrived in London to attend Council on 17 July 1260, the same day Llewelyn’s army took Builth Castle, which Roger had held as custodian for Prince Edward.
Mortimer fought for the King against the rebel Simon de Montfort, 6th Earl of Leicester, and almost lost his life in 1264 at the Battle of Lewes fighting Simon de Montfort's men. In 1265 Mortimer helped rescue Prince Edward and they made an alliance against de Montfort.
In August 1265, de Montfort's army was surrounded by the River Avon on three sides, and Prince Edward's army on the fourth. Mortimer had sent his men to block the only possible escape route, at the Bengeworth bridge. The Battle of Evesham began in earnest. Montfort's Welsh soldiers broke and ran for the bridge, where they were slaughtered by Mortimer's men. Mortimer himself killed Simon de Montfort, 6th Earl of Leicester.
Roger was rewarded for his efforts at Evesham, receiving grants of land including the "county and honour" of Oxford, or more specifically, the lands forfeited by Robert de Vere. In Sep 1265 Roger was at the Parliament at Winchester and was sheriff of Herefordshire from 1266-1267. In Aug 1270, Roger was named one of the trustees for Prince Edward’s estates while the Prince traveled to the Holy Lands on Crusade.
Roger Mortimer died shortly before 30 Oct 1282, at Kingsland, Herefordshire, aged about 50, and was buried at Wigmore Abbey, Wigmore, Herefordshire, England where his tombstone read:
Here lies buried, glittering with praise, Roger the pure, Roger Mortimer the second, called Lord of Wigmore by those who held him dear. While he lived all Wales feared his power, and given as a gift to him all Wales remained his. It knew his campaigns, he subjected it to torment.
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