I've been wondering what the succession laws for Aquitaine were. The only link I've found is this wikipedia link.
I have no idea if it's correct or not. According to this, it also applies to Toulouse.As a successor state to the Roman province of Gallia Aquitania and the Visigothic Kingdom (418–721), Aquitania (Aquitaine) and Languedoc (Toulouse) inherited the Visigothic Law and Roman Law which had combined to allow women more rights than their contemporaries in other parts of Europe. Particularly with the Liber Judiciorum, which was codified in 642 and 643 and expanded in the Code of Recceswinth in 653, women could inherit land and title and manage it independently from their husbands or male relations, dispose of their property in legal wills if they had no heirs, and women could represent themselves and bear witness in court by age 14 and arrange for their own marriages by age 20.[2] As a consequence, male-preference primogeniture was the practiced succession law for the nobility.