Princess Maria of Greece and Denmark was a daughter of King George I of Greece and his wife Grand Duchess Olga Constantinovna of Russia. She was a sister of King Constantine I of Greece and a first cousin of Tsar Nicholas II of Russia and King George V of the United Kingdom.
- Citizenship
- Kingdom of Greece, Russian Empire
- Born
- March 3, 1876, 1876
- Died
- December 14, 1940, 1940