Betry de Mendy, son of Pedro de Mendy and Marie de Joanneshandirena, owners of the borde of Miguelertcainarena in Jaurmendy.
His godparents were Betry de Mendy, paternal uncle and Marie, owner of Inxauspe of Guermiete.
Note: it seems as if Miguelertcainarena was a mistake.