• Married: 1011, before 10 March
• Died: Before 1018

  Research Notes:

The Chronicle of Adémar de Chabannes names "Briscam" as sister of "dux Santii", when recording her marriage to "Willelmi ducis" after the death of the latter's first wife. The Chronicle of Saint-Maixent names "sororem Sancii Ducis Gasconiæ, nomine Briscam" as second wife of Duke Guillaume, in a later paragraph recording the death of "Sancia conjuge Guillermi ducis". "Willelmi ducis Aquitanorum, Willelmi filii eius, Odoni filii eius, Prisca comitisse" subscribed the charter dated to [1012/18] under which "Ugo Liziniacensis domnus" donated property to St Cyprien, Poitiers. An agreement between the abbots of Jumièges and Bougeuil concerning an exchange of land in Poitou, by charter dated [13 Apr/4 Apr] 1012, is subscribed by "Richardus…filius Ricardi principi magni…Vuillelmus Pictavorum comes et uxor Prisca…". ¹