Stapleton says that “Gunnora, the mother of William de Briouze, was apparently another daughter of the same parentage of Alberada”...
Henry II King of England confirmed the possessions of the abbey of la Trinité de Caen, including the donation by "Gonnor matris Willelmi de Breosa" of land "in Bavent…et…in Rovres et in Cierneio et in Craissanvilla et in Quatrepuiz", by charter dated to [1180/82] 1
Marriage Information:
Gunnora married Unknown de Briouse.
Sources
1
Foundation for Medieval Genealogy, Medlands, Gunnora.