Etienne de Thamoussou, son of Etienne de Thamoussou and Marie d'Ehaylearena in the Aldudes, owners of the borde of Carguinhey in the Aldudes.
His godparents were Etienne de Thamoussou of the village of Itxaxou, paternal grandfather and Marie de Garaycoetche of the village of Lans in the High Navarre, maternal grandmother.