Evidence Reference
Douglas Richardson, Plantagenet Ancestry, 2nd ed. (2011)
Associated with William de Valence
Citation
Douglas Richardson, Plantagenet Ancestry: A Study In Colonial And Medieval Families, 2nd ed. (Salt Lake City: Douglas Richardson, 2011), Lusignan article.
Supporting claim
supported
William de Valence (c. 1225–1296), Earl of Pembroke, was a son of Hugh X and Isabelle d’Angoulême and a Poitevin half-brother of Henry III of England. Extensively documented in English royal charters, Close Rolls, and Patent Rolls.