sentences:  He is mentioned in the cartulary of Auch, as a son of García Sánchez, and the "Códice de Roda", which mentions him as the heir of Gascony.On his father's death, he inherited the duchy itself, which included the viscounties of Lomagen, Gavarret, Tursan, and Bruillois.His younger brothers, William and Arnold, inherited Fézensac (including Armagnac) and Astarac respectively with the comital title.