Catherine and Alexander had four children styled Prince/Princess (knyaz/knyazhna): Prince George Alexandrovich Yurievsky (12 May 1872 – 13 September 1913); married Countess Alexandra von Zarnekau, a morganatic daughter of Duke Constantine Petrovich of Oldenburg and Agrafena Japaridze, Countess von Zarnekau.
Grand Duke Nicholas Nikolaevich of Russia: 9. Princess Charlotte of Prussia: 2. Grand Duke Peter Nikolaevich of Russia: 10. Duke Peter of Oldenburg: 5. Duchess Alexandra of Oldenburg: 11. Princess Therese of Nassau-Weilburg: 1. Prince Roman Petrovich of Russia: 12. Mirko Petrović-Njegoš, Grand Voivode of Grahovo: 6. Nicholas I of Montenegro ...
An accomplished poet and playwright, KR also took great interest in the direction of his plays. The Grand Duke actually appeared in his last play, "King of Judea," playing the role of Joseph of Arimathea. The Grand Duke's artistic slavophilism and devotion to duty endeared him to both Alexander III and Nicholas II.
Grand Duke Michael Alexandrovich of Russia (Russian: Михаи́л Алекса́ндрович; 4 December [O.S. 22 November] 1878 – 13 June 1918) was the youngest son and fifth child of Emperor Alexander III of Russia and youngest brother of Nicholas II.
Nicholas II or Nikolai II Alexandrovich Romanov (18 May [O.S. 6 May] 1868 – 17 July 1918), known in the Russian Orthodox Church as Saint Nicholas the Passion-Bearer, was the last Emperor of Russia, King of Congress Poland and Grand Duke of Finland, ruling from 1 November 1894 until his abdication on 15 March 1917.
Peter I, Grand Duke of Oldenburg: 17. Princess Sophie Charlotte of Schleswig-Holstein-Sonderburg-Beck: 4. Augustus, Grand Duke of Oldenburg: 18. Frederick II Eugene, Duke of Württemberg: 9. Duchess Frederica of Württemberg: 19. Friederike Dorothea of Brandenburg-Schwedt: 2. Peter II, Grand Duke of Oldenburg: 20. Karl Louis, Prince of Anhalt ...
Nicholas's mother, his father's first cousin's daughter, was a daughter of Duke Konstantin Peter of Oldenburg (1812–1881) and Princess Therese of Nassau (1815–1871). His maternal grandfather was a son of Duke George of Oldenburg and Grand Duchess Catherine Pavlovna of Russia, daughter of Paul I of Russia and Maria Fedorovna of Württemberg.