Gilbert Marshal, 4th Earl of Pembroke

Gilbert Marshal, 4th Earl of Pembroke (1194 – 27 June 1240) was the third son of William Marshal, 1st Earl of Pembroke and Isabel de Clare, 4th Countess of Pembroke, the daughter of Richard de Clare.
==From Wikipedia==
Gilbert acceded to the title of Earl of Pembroke and Lord Marshal on 11 June 1234, on the death of his elder brother Richard who had died childless.
Gilbert was married on 1 August 1235 in Berwick-upon-Tweed to Marjorie of Scotland (1200 – 17 November 1244), daughter of King William of Scotland. Their marriage was childless. By an unknown mistress he had one illegitimate daughter, Isabel, who was betrothed to Rhys ap Maelgwn Fychan. Gilbert captured Castell Meredydd from Morgan ap Hywel in 1236 during a truce between Llywelyn the Great and King Henry III of England. After Marshal took the castle he seems to have fortified it with a bailey and curtain wall. He was forced to return it to Morgan by the terms of the truce, or "for fear of the lord Llywelyn".
==The Banners Saga==
Gilbert was an important ally and supporter of Henry, Lord of Ireland and traveled with him prior to his presentation to the court to offer him advice. Their party was reportedly assaulted by a band of French brigands in 1240 and both were killed. Gilbert was succeeded by his brother Walter Marshall, 5th Earl of Pembroke, who accused King Henry III of the crime and rose in open rebellion against the Crownhttps://forums.sufficientvelocity.com/threads/ja-nuns-hons-pris-a-medieval-nation-game.18650/page-4#post-3602917.
==References==