Evidence Reference
Douglas Richardson, Plantagenet Ancestry, 2nd ed. (2011)
Associated with Hugh IX de Lusignan
Citation
Douglas Richardson, Plantagenet Ancestry: A Study In Colonial And Medieval Families, 2nd ed. (Salt Lake City: Douglas Richardson, 2011), Lusignan article. Provides the parent-child chain Hugh VIII → Hugh IX → Hugh X and identifies Guy and Aimery as Hugh VIII's sons.
Supporting claim
supported
Hugh IX de Lusignan (c. 1163–1219), known as "le Brun" (the Brown), Count of La Marche, was the eldest son of Hugh VIII and the father of Hugh X de Lusignan. He anchors the Poitou continuity in the generation between Hugh VIII (whose captivity in Aleppo pulled the family into the East) and Hugh X (whose marriage to Isabelle d'Angoulême produced Alix and her siblings).