Princess Maria of Greece and Denmark Greek Royal (1876–1940) Parents Olga Constantinovna of Russia George I of Greece Children Princess Xenia Georgievna of Russia Nina Georgievna of Russia Siblings Princess Olga of Greece and Denmark Prince Andrew of Greece and Denmark Princess Alexandra of Greece and Denmark Constantine I of Greece Prince Christopher of Greece and Denmark Prince Nicholas of Greece and Denmark Prince George of Greece and Denmark Partners Perikles Ioannidis Grand Duke George Mikhailovich of Russia
