Namesakes
Maria of Yugoslavia
(a.k.a. Karađorđević) (f) 1900-1961 
Other Royalty 1900-1922; 1922-1934 Romania; Yugoslavia (princess/queen consort)
Olga of Greece and Denmark
(a.k.a. Karađorđević) (f) 1903-1997
Other Royalty 1903-1923; 1923-1976 Denmark; Greece; Yugoslavia (princess)