Marie, Princesse et Duchesse d'Arenberg 2 Mar 1823 Bruxelles - 3 Aug 1861 Frascati Parents Ludmilla, Prinzessin von Lobkowicz Prosper Louis, 7th Duke of Arenberg Children Don Pietro, Principe Aldobrandini, Principe di Sarsina Siblings Engelbert, 8th Duke of Arenberg Antoine François d'Arenberg, prince d'Arenberg