• Olivier (1060), Viscount Castillon, founder of Castillon monastery • Pierre de Castillon, 1137 founder of
Faize Abbey •
Jean I de Grailly •
Pierre II de Grailly, 1307/56 appointed, his son, Viscount de Bénauges and de Castillon; ∞ I Assalhilde de Bordeaux, Captal de Buch; ∞ II Rosemburge de Périgord, daughter of Hélie de Talleyrand, Comte de Périgord •
Jean II de Grailly († 1343), son from his first marriage,
Captal de Buch, Vicomte de Bénauges et de Castillon; ∞ Blanche de Foix, daughter of
Gaston I,
Count of Foix •
Jean III de Grailly († 1376), his son,
Captal de Buch •
Archambaud de Grailly, son of Pierre II from his second marriage, 1365 Vicomte de Castillon et de Gurson, 1376 Captal de Buch and Vicomte de Bénauges, 1398 Count of Foix etc.; ∞
Isabelle, 1398
Countess of Foix and
Bigorre,
Viscountess of Béarn and
Castelbon etc., sister of
Matthew, Count of Foix •
Gaston I de Foix-Grailly († post 1455), his son, 1412–1451
Captal de Buch, Count of Bénauges and Viscount Castillon, Herr von Grailly •
Jean IV de Foix-Grailly († 1485), his son, retained Castillon in 1461 •
Gaston II de Foix-Candale († 1500), from 1485 Captal de Buch,
Earl of Kendal and Bénauges as well as Viscount Castillon • Alain, his son, Viscount Castillon • … • Louis de Gramont, 1535 Viscount Castillon (
House of Dax), ∞ Madeleine d’Aydie known as de Lescun, daughter of
Odet d’Aydie, Count of Comminges, Viscount Castillon and Fronsac • Françoise, his daughter, Viscountess Castillon