Sir William de Cantelou III Baron Abergavenny 
Sir William de Cantelou III was born about 1216 in Calne, Wiltshire or Aston Cantlow, Warwickshire. Sir William de Cantelou III's father was William de Cantelou II Lord Tre-Cantlow and his mother was Milicent de Gournay. He had three brothers and two sisters, named Thomas, John, Hugh, Agnes and daughter. He was the second oldest of the six children. He died on September 25th, 1254 in Calne, Wiltshire, England.General Notes
William de Cantelou o d. 25 Sep 1254, was baron Abergavenny, son of William de Cantelou of Calne, Wilts (CP I 22 129).
Sir William Cantelupe (Cantelou), of Calne, Wiltshire, and Aston Cantlow, co. Warwick, Baron Abergavenny, d. 25 Sept 1254 at Calne, m. bef 1249 to Eva de Braiose, d. July 1255, daughter of William de Braose and Eva Marshall. William in turn was the son of William de Cantelou (Cauntelo), of Calne, Wilts, Lord of Tre-Cantlow (Cantleston), d. 22 Feb 1250/1 at Calne, m. to Melicent de Gurnay, d. 1260, daughter of Hugh V de Gournay and Juliana de Dammartin.
Sources: Weis and Sheppard (1992); G.T. Clark (1886) Limbus Patrum Morganiae et Glamorganiae.
I J Saunders *English Baronies: a study of their origin and descent 1086-1327* (Oxford, 1963) p.39f.
William I de Cantelou d.1239
William II de Cantelou d.1251; m. Millicent de Gurnay
William III de Cantelou d.1254; m. Eve de Braose
George de Cantelou d.1273 s.p.
George's sisters were (1) Millicent d.1299 and (2) Joan. (1) was George's coheir and the son of (2) was his other coheir. If their were other daughters of William III and they were not his eventual heirs or heirs in their issue then they would have been illegitimate. I have no information on such progeny.
William m. Eve, dau. and co-heiress of William Braose, Lord of Brecknock and Abergavenny, and in her right became possessed of that honour. He d. in the flower of his youth, leaving issue, George, Milicent, and Joan. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 101, Cantilupe, Barons Cantilupe]
Sir William de Cantelou III and Eva were married in a religious ceremony after July 25th, 1238. They had a son and two daughters, named George, Joan and Millicent.
He had a biological daughter named daughter.
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