Background
Ferdinand was the eldest child and son of Prince Alfonso, Count of Caserta and his wife Princess Maria Antonietta of Bourbon-Two Sicilies. He was a grandson of Ferdinand II of the Two Sicilies and an older brother of Prince Carlos of Bourbon-Two Sicilies, Maria Immaculata, Princess Johann Georg of Saxony, Maria Cristina, Archduchess Peter Ferdinand of Austria, Maria di Grazia, Princess Imperial of Brazil, Prince Ranieri, Duke of Castro, Prince Philip of Bourbon-Two Sicilies, and Prince Gabriel of Bourbon-Two Sicilies.