Irina Tolstaya Princess of Isenburg (1917–1998) Parents Aleksandr Tolstoy Irina Rayevskaya Children Maria Annunciata Prinzessin von Isenburg Elisabeth Prinzessin von Isenburg Irene Prinzessin von Isenburg Prince Franz Alexander, 9th Prince of Isenburg Siblings Duke Georg Alexander, Duke of Mecklenburg-Strelitz Duchess Helene of Mecklenburg-Strelitz Duke Carl Gregor of Mecklenburg Partners Franz Ferdinand, Prince of Isenburg