Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: 2 May 1230.
The date is given in the Complete Peerage (1:22). William was hanged by Llywelyn ab Iorwerth.
Relationships
Father: Reginald de Briouze (died 1227/8).
This relationship is given by Turner (ODNB), by Holden, and by the Complete Peerage (1:22). It is recorded in fines from 13 July 1228 (12 Henry III, nos. 227 and 228).
Mother: Graecia, daughter of William Brewer.
This relationship is given by Turner (ODNB) and by the Complete Peerage (1:22).
Spouse: Eva Marshal, daughter of William Marshal, 4th earl of Pembroke.
This relationship is given in the Complete Peerage (1:22) and by Holden.
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Elwes.)
Isabel de Briouze (died 1248) married Dafydd ap Llywelyn in 1230.
Maud de Briouze (died before 23 March 1301) married Roger (IV) de Mortimer in 1247.
Eva de Briouze (died 20 July 1255) married William (IV) de Cantelou.
Eleanor de Briouze married Humphrey de Bohun.
References
Cokayne, George Edward, and Vicary Gibbs; et al. The complete peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct, or dormant [2nd ed.]. (London: St. Catherine Press, 1910-59).
Elwes, Dudley G. Cary. The Family of De Braose 1066-1326. (1883).
Henry III Fine Rolls Project. The National Archives and King’s College London (accessed 15 March 2015).
Holden, Brock.W. Lords of the Central Marches: English Aristocracy and Frontier Society, 1087-1265. (Oxford University Press, 2008).
Rees, W. "The Medieval Lordship of Brecon", Transactions of the Honourable Society of Cymmordorion (1915-16), 165-225.
Turner, Ralph V. “Briouze, William (III) de (d.1211)” in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).