Étienne was the son of Adalhard but his mother is unknown. The date and place of his birth have not been found.
Étienne
Adalhard (-c0865)
Leuthard I de Fézensac (0780-0816)
Gérard I de Fézensac (c0745-0779)
Hrotrude d'Austrasie
Grimeut d'Aquitaine (c0784-c0856)