- Born
- Died
- Birth nameKonstantin von Schleswig-Holstein-Sonderburg-Glücksburg
- King Constantine was born on August 2, 1868 in Athens, Kingdom of Greece. He was married to Sophia of Prussia. He died on January 11, 1923 in Palermo, Sicily, Kingdom of Italy.
- SpouseSophia of Prussia(October 27, 1889 - January 11, 1923) (his death, 6 children)
- Children
- Parents
- RelativesPrince George of Greece and Denmark(Sibling)Prince Andrew of Greece and Denmark(Sibling)Amedeo Duca D'Aosta(Grandchild)Aimone Duca D'Aosta(Great Grandchild)Queen Alexandra(Aunt or Uncle)Czarina Maria Fyodorovna(Aunt or Uncle)Prins Valdemar(Aunt or Uncle)H.R.H. Prince Peter of Greece(Niece or Nephew)Princess Maria Pavlovna(Niece or Nephew)Dmitri Pavlovich Romanov(Niece or Nephew)Princess Olga Paul of Yugoslavia(Niece or Nephew)Countess of Toerring-Jettenbac Princess Elizabeth(Niece or Nephew)Prince Michael of Greece(Niece or Nephew)Grand Duke Michael(Cousin)Prins Aage(Cousin)Prins Axel(Cousin)Prins Erik(Cousin)Prins Viggo(Cousin)Prinsesse Margrethe(Cousin)John Constantinovitch(Cousin)Tsar Nicholas II(Cousin)Georgiy Aleksandrovich Romanov(Cousin)Prince Philip(Niece or Nephew)Princess Marina(Niece or Nephew)Prince Albert Victor(Cousin)King George V(Cousin)Princess Louise(Cousin)Dronning Maud(Cousin)King Haakon VII(Cousin)Princess Ingeborg(Cousin)King Christian X(Cousin)King Constantine II(Grandchild)Crown Prince of Greece Pavlos(Great Grandchild)Prince Nikolaos(Great Grandchild)Theodora Greece(Great Grandchild)Prins Harald(Cousin)Prins Gustav(Cousin)King Frederik VIII(Aunt or Uncle)Christian IX(Grandparent)Prinsesse Thyra(Aunt or Uncle)Ernest Augustus(Cousin)Queen Sofía of Spain(Grandchild)Elena de Borbón(Great Grandchild)Cristina de Borbón(Great Grandchild)King Felipe VI of Spain(Great Grandchild)Princess Irene of Greece(Grandchild)Princess Alexandra of Greece and Denmark(Grandchild)Crown Prince Alexander of Serbia(Great Grandchild)King Michael(Grandchild)Custodian of the Crown of Romania Margareta(Great Grandchild)
- Son of King George of Greece and Queen Olga. Father of Elena of Greece and Denmark. Grandfather of King Michael, and Princess Alexandra of Greece and Denmark. Great-grandfather of Crown Prince Alexander of Serbia.
- His wife was the grand-daughter of Queen Victoria and Prince Albert, the sister of Kaiser Wilhelm II and Prince Henry of Prussia, and the aunt of Crown Prince Hohenzollern and Viktoria Luise von Preußen.
- King of Greece from March 18, 1913 to June 11, 1917, and from December 19, 1920 to September 27, 1922.
- His son, King George II of Greece, married Princess Elisabeth of Romania, the daughter of King Ferdinand of Romania and Queen Marie of Romania. Constantine's daughter, Elena, married Elisabeth's brother, King Carol II.
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