Cecilie, Alexandrine and Friedrich Franz of Mecklenburg-Schwerin with their mother Grand Duchess Anastasia. Born on 20 September 1886 in Schwerin, Cecilie was the youngest daughter of Frederick Francis III, Grand Duke of Mecklenburg-Schwerin and Grand Duchess Anastasia Mikhailovna of Russia . 
Grand Duchess Elena Vladimirovna of Russia (29 January 1882 – 13 March 1957), sometimes known as Helen, Helena, Helene, Ellen, Yelena, Hélène, or Eleni, was the only daughter and youngest child of Grand Duke Vladimir Alexandrovich of Russia and Duchess Marie of Mecklenburg-Schwerin.
Princess Elisabeth of Denmark, RE (Elisabeth Caroline-Mathilde Alexandrine Helena Olga Thyra Feodora Estrid Margrethe Désirée; 8 May 1935 – 19 June 2018) was a member of the Danish royal family. She was the only daughter and eldest child of Hereditary Prince Knud and Hereditary Princess Caroline-Mathilde of Denmark , and a first cousin of the present Danish monarch , Queen Margrethe II .
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Marie Alexandrine Elisabeth Eleonore was born a duchess of the Grand Ducal House of Mecklenburg to Frederick Francis II, Grand Duke of Mecklenburg-Schwerin - the then Grand Duke of Mecklenburg-Schwerin and his first wife, Princess Augusta Reuss of Köstritz (1822–1862) - in the Schloss Ludwigslust.
Princess Alexandrine Irene of Prussia (7 April 1915 – 2 October 1980) was the oldest daughter and fifth child of Wilhelm, German Crown Prince, and Cecilie of Mecklenburg-Schwerin. Her grandparents were Wilhelm II, German Emperor and his wife Augusta Victoria of Schleswig-Holstein , and Frederick Francis III of Mecklenburg-Schwerin and Grand Duchess Anastasia Mikhailovna of Russia .
The first years of the marriage were relatively happy, but the Grand Duchess disappointed Catherine II, who did not live to see a son be born to the young couple. The death of Catherine the Great in November 1796 brought Elizabeth's father-in-law Paul I to the Russian throne. During the years of his reign, Elizabeth avoided Paul's court.