Olga Constantinovna of Russia

Grand Duchess Olga Constantinovna of Russia (Russian: Ольга Константиновна Романова), later Queen Olga of the Hellenes (Greek: Βασίλισσα Όλγα των Ελλήνων) (3 September [O. S. 22 August] 1851 -- 18 June 1926), was the wife of King George I of Greece and, briefly in 1920, regent of Greece Wikipedia: http://en.wikipedia.org/wiki/Olga_Constantinovna_of_Russia