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 Georg Alexander, Duke of Mecklenburg-Strelitz Helene von Mecklenburg Duke Carl Gregor of Mecklenburg Partners Franz Ferdinand, Prince of Isenburg