House of Mowbray

His heir, his brother Roger's son, Robert de Mowbray, Earl of Northumbria, was forfeited and imprisoned for life on rebelling in 1095.

[3][1]Roger, a great lord with a hundred knight's fees, was captured with King Stephen at the battle of Lincoln, joined the rebellion against Henry II (1173), founded abbeys, and went on crusade.

His grandson William, a leader in the rising against King John, was one of the 25 barons of the Magna Carta, as was his brother Roger, and was captured fighting against Henry III at the rout of Lincoln (1217).

[3] His wife, a Braose heiress, added Gower in South Wales and the Bramber lordship in Sussex to the great possessions of his house.

At his death (1481) his vast inheritance devolved on his only child Anne, who was married as an infant to Edward IV's younger son Richard (created duke of Norfolk and earl of Nottingham and Warenne), but died in 1481.

Arms granted by Richard II to Thomas de Mowbray, 1st Duke of Norfolk .
Thomas de Mowbray, 1st Duke of Norfolk as Earl of Nottingham. Surrey Roll (ca.1395), quartering the new and old Mowbray arms
Richard FitzAlan, 11th Earl of Arundel ; Thomas of Woodstock, 1st Duke of Gloucester ; Thomas de Mowbray, Earl of Nottingham; Henry, Earl of Derby (later Henry IV); and Thomas de Beauchamp, 12th Earl of Warwick , demand that Richard II let them prove by arms the justice of their rebellion
Henry V, while Prince of Wales, presenting Thomas Hoccleve 's, Regement of Princes to John de Mowbray, 2nd Duke of Norfolk, 1411–1413. British Library