General Notes

William de Mowbray, who, in the 6th Richard I [1195], paying £100 for his relief, had livery of his lands. This feudal lord, upon the accession of King John [1199], was tardy in pledging his allegiance and, at length, only swore fealty upon condition that the king should render to every man his right. At the breaking out of the baronial war, it was no marvel that he should be found one of the most forward of the discontented lords and so distinguished that he was chosen with his brother, Roger, amongst the twenty-five celebrated barons appointed to enforce the observance of Magna Carta. In the reign of Henry III, adhering to the same cause, he was at the battle of Lincoln and taken prisoner there, when his lands were seized and bestowed upon William Mareshal, the younger, but he was subsequently allowed to redeem them, after which he appears to have attached himself to the king and was with the royal army at the siege of Bitham Castle, in Lincolnshire. He m. Agnes, dau. of the earl of Arundel, and dying in 1222, was s. by his elder son, Nigel de Mowbray. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 386, Mowbray, Earls of Nottingham, Dukes of Norfolk, Earls-Marshal, Earls of Warren and Surrey]

One of the 25 Barons appointed to enforce Magna Carta.