Arnaut Guilhem was the ancestor of three branches of the house of Marsan through his three sons: the co-lords of Marsans and lords of Roquefort and Montgaillard; the lords of Cauna; and the lords of Tardets.
Mont-de-Marsan | Marsan | Eddie Marsan | Henri Arnaut de Zwolle | Guilhem d'Omelas | Arnaut de Mareuil | Villeneuve-de-Marsan | Saint-Guilhem-le-Désert | Pierre Marsan | Jeanne-Marie Marsan | Guilhem Figueira |