Oskar Freitag's birth name is Oskar Fischer.
Oskar Krabbe's birth name is Oskar Krabbe-Rosqvist.
Oskar Sima's birth name is Oskar Michael Sima.
Oskar Alyhr's birth name is Karl Oskar Alyhr.
Oskar Werner's birth name is Schliessmayer, Oskar Josef.
Oskar Merikanto's birth name is Frans Oskar Merikanto.
Oskar Messter's birth name is Oskar Eduard Messter.
Oskar Fischinger's birth name is Wilhelm Oskar Fischinger.
Oskar Snickars's birth name is Karl Oskar Petersson Snickars.
Oskar Elliot's birth name is Rolf Oskar Jakob Elliot.
Oskar Maria Graf's birth name is Oskar Graf.
Oskar Kurganov's birth name is Esterkin, Oskar Iyeremiyevich.