Brother of Guillermo VII. He/She was born in 1027 and died in 1086. He/She retook Saintes to the heirs of Godofredo Martel. He/She defeated the Saracens of Spain and sacked them some populations. Guillermo brought its States of Gascony, who had taken over the House of Armagnac to the death of Eudes, and had by successor to his son.