Olga Constantinovna of Russia Queen of the Hellenes (1851–1926) (1851–1926) Parents Princess Alexandra of Saxe-Altenburg Grand Duke Konstantin Nikolayevich of Russia Children Prince George of Greece and Denmark Constantine I of Greece Prince Nicholas of Greece and Denmark Princess Maria of Greece and Denmark Princess Olga of Greece and Denmark Princess Alexandra of Greece and Denmark Prince Andrew of Greece and Denmark Prince Christopher of Greece and Denmark Siblings Grand Duke Nicholas Constantinovich of Russia Grand Duke Vyacheslav Constantinovich of Russia Grand Duke Dimitri Constantinovich of Russia Grand Duchess Vera Konstantinovna of Russia Grand Duke Konstantin Konstantinovich of Russia Partners George I of Greece
