House of Gascony

Cadet Branches
House of Fézensac
Counts of Fézensac and Armagnac
Issued from Guillém I, 2nd son of García II Sánchez, Duke of Gascony
House of Astarac
Lords of Mirande
Counts of Astarac
Issued from Arnaud I García, 3rd son of García II Sánchez, Duke of Gascony
House of Lomagne
Viscounts of Lomagne
and Auvillar
Counts of Armagnac, Fézensac and Rodez
Issued from Donat Sancho, son of Sancho IV Garcés, Duke of Gascony
House of Dax
Viscounts of Oloron and Dax
Issued from Aner I Sancho, son of Sancho IV Garcés, Duke of Gascony
House of Albret
Lords of Albret and Nérac
Viscounts of Tartas, Béarn
and Marsan
Counts of Foix and Bigorre
Kings of Navarre
Issued from Amanieu, son of Sancho IV Garcés, Duke of Gascony
House of Marsan
Viscounts of Marsan and Maremne
Issued from Ezi, son of Sancho IV Garcés, Duke of Gascony