Hugh de Montfort, who, on account of his mother being so great an heiress, assumed the name of Montfort, inherited all the possessions of his grandfather and was called Hugh the fourth. This Hugh, having m. Adeline, dau. of Robert, Earl of Mellent, joined with Waleran, her brother, and all those who endeavoured to advance William, son of Robert Curthose, against King Henry I in 1124, and entering Normandy for that purpose, he was made prisoner, with the said Waleran, and confined for the fourteen years ensuing. The time of his death is not ascertained but he left issue, Robert; Thurstan; Adeline, m. to William de Britolio; Ada, m. to Richard, son of the Earl of Gloucester. He was s. by his elder son, Robert de Montfort. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage Ltd, London, England, 1883, p. 377, Montfort, Barons Montfort]