Maria Christina of the Two Sicilies
Antonio was the only surviving son of Prince Antoine of Orléans, Duke of Montpensier, and his wife Infanta Luisa Fernanda of Spain. Through his father, he was a grandson of King Louis Philippe of the French and his wife Princess Maria Amalia of the Two Sicilies. Through his mother, he was a grandson of King Ferdinand VII of Spain and his wife Princess Maria Christina of the Two Sicilies.