Batiste d'Oxagarate, natural son of Jean d'Oxagarate, son of the borde of Harguina in the quartier of Esnaratxou and Dominique d'Apesteguy, daughter of the house of Cuburu in St. Etienne, "solt et solte".
His godparents were Baptiste d'Epele and Catherine d'Iriart, inheritor of Manurarenia.