Princess Alexandra

Francis, Duke of Teck GCB GCVO (Francis Paul Charles Louis Alexander; 28 August 1837 – 21 January 1900), known as Count Francis von Hohenstein until 1863, was an Austrian-born nobleman who married into the British royal family. He was the father of Queen Mary, and thus a great-grandfather of the current British monarch, Queen Elizabeth II. Francis held the Austrian title of Count of Hohenstein (Graf von Hohenstein), and the German titles of Prince (Fürst) and later Duke of Teck (Herzog von Teck), and was given the style of Serene Highness in 1863. He was granted the British style of Highness in 1887.

George I (Greek: Γεώργιος Α΄, Geórgios I; 24 December 1845 – 18 March 1913) was King of Greece from 30 March 1863 until his assassination in 1913.

Prince Alexander of Yugoslavia (Serbian: Александар П. Карађорђевић / Aleksandar P. Karađorđević; 13 August 1924 – 12 May 2016) was the elder son of Prince Paul, who served as Regent of Yugoslavia in the 1930s, and his wife, Princess Olga of Greece and Denmark.

George V (George Frederick Ernest Albert; 3 June 1865 – 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936.