Dictionary of National Biography, 1885-1900/Cantelupe, William de (d.1254)
CANTELUPE, WILLIAM de, third Baron Cantelupe (d. 1254), succeeded his father, William, the second baron [q. v.], in 1251, though the king is described as treating him with harshness. By his marriage with Eva, one of the heiresses of William de Braose, he obtained the honour of Bergavenny, and is said by some writers to have been summoned to parliament as Baron Bergavenny. He was in Gascony with the king in 1253. He died in 1254 and was buried at Studley, Simon de Montfort being one of those who laid him in the grave. By his widow, Eva (d. 1255), he had a son, George [q. v.]
[Dunstable Annals, 192, 194, 196; Matt. Paris, v. 224, 463; Dugdale's Baronage; Nicolas's Peerage, ed. Courthope.]