Name Suffix:<NSFX> [EARL OF PEMBROKAncestral File Number:<AFN> LLZR-2CWilliam Marshal, Earl of Pembroke, who, in the time of his father, was as strenuous a supporter of the baronial cause as that nobleman was of the royal interests, and was constituted one of the twenty-five barons appointed to enforce the observance of Magna Carta, being then styled "Comes Mareschal, Jun." After the decease of King John, however, he made his peace and, becoming loyally attached to the new monarch, obtained grants of the forfeited lands of his former companions, Sayer de Quincy, Earl of Winchester, and David, Earl of Huntingdon. His lordship was subsequently engaged against the Welsh and defeated their Prince, Llewelyn, with great slaughter; and in the 14th Henry III [1230], he was captain-general of the king's forces in Brittany. He m. 1st, Alice, dau. of Baldwin de Betun, Earl of Albemarle; and 2ndly, the Lady Alianore Plantagenet, dau. of King John, and sister of Henry III, but had issue by neither. He d. in 1231, and was s. by his next brother, Richard Marshal. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 358, Marshal, Earls of Pembroke]