On 6 November 1919 in Luxembourg, the prince married his first cousin Grand Duchess Charlotte of Luxembourg, having been admitted to the nobility of Luxembourg and also made Prince of Luxembourg by Grand Ducal decree the day before.per Arrêté grand-ducal du 5 novembre 1919. (Published in Mémorial A n° 74 de 1919). Unlike some European consorts, Félix neither adopted his wife's dynastic surname (of Nassau), nor relinquished his own title and name "Prince of Bourbon-Parma". His traditional style as a Bourbon prince of the Parmesan branch is the reason that cadet members of the Grand Ducal Family of Luxembourg enjoy the style of Royal Highness (but that style belongs to the Luxembourg monarch and heir apparent by right, as the historical prerogative of grand-ducal dynasties).
