Who was the brother of XXX?
Clotilde de Vaux
Elder daughter of a branch of a preeminent family of ancient nobility, sister of French military officer and mathematician Maximilien-Marie de Ficquelmont, follower of Positivism, Clotilde de Vaux was educated at the prestigious Maison d'éducation de la Légion d'honneur.
Maximilien-Marie de Ficquelmont