Composers from A-Z

1. Oakley, George (born 1979)
2. Obermüller, Karola (born 1977)
3. Oberthür, Charles (1819-1895)
4. Obradors, Fernando Jaumandreu (1897-1945)
5. Obran, Marcel (1884-1958)
6. Obrecht, Jakob (1457-1505)
7. O'Brien, Charles (1882-1968)
8. Obst, Michael (born 1955)
9. O'Carolan, Turlough (1670-1738)
10. Ockeghem, Johannes (1430-1497)
11. Ockert, Matthias (born 1970)
12. O'Connor, Mark (born 1962)
13. Odegaard, Henrik (born 1955)
14. Odeh-Tamimi, Samir (born 1970)
15. Odermatt, Gotthard (born 1974)
16. Oehler, Thomas (born 1980)
17. Oehring, Helmut (born 1961)
18. Oestreich, Carl (1800-1840)
19. of Castile, Alfonso X. (1221-1284)
20. Ofenbauer, Christian (born 1961)
21. Offenbach, Jacques (1819-1880)
22. Offenbauer, Christian (born 1961)
23. Oforska, Grace (born 1993)
24. Ogdon, John (1937-1989)
25. Oginski, Michael Kleofas (1765-1833)
26. Ogura, Kei (born 1944)
27. Ohana, Maurice (1914-1992)
28. Ohmae, Satoshi (born 1943)
29. Ohrwalder, Martin (born 1972)
30. Oja, Eduard (1905-1950)
31. O'Kelly, Henri (1859-1938)
32. Okunev, German (1931-1973)
33. Olah, Tiberiu (1928-2002)
34. Olaya, Pedro (1911-1941)
35. Olbrisch, Franz Martin (born 1952)
36. Olczak, Krzysztof (born 1956)
37. Oldfield, Mike (born 1953)
38. O'Leary, Jane (born 1946)
39. Olechowski, Jozef (born 1959)
40. Olenchik, Iwan Fedorowich (born 1952)

1. Olive, Vivienne (born 1950)
2. Oliveira, Joao Pedro (born 1959)
3. Oliver, Benjamin (born 1981)
4. Olivieri, Dino (1905-1963)
5. Olofsson, Kent (born 1962)
6. Olsen, Carl Gustav Sparre (1903-1984)
7. Olsen, Morten (born 1961)
8. Olson, Lars Jergen (born 1958)
9. Olsson, Pers Erik (born 1942)
10. Olsson, Otto (1879-1964)
11. Olthuis, Kees (born 1940)
12. O'Malley, Patrick (born 1989)
13. Omar, Mohammed (1905-1980)
14. Omelchuk, Oxana (born 1975)
15. Omura, Kumiko (born 1970)
16. Ona, Erik (born 1961)
17. Ondishko, Denise (2. Hälfte 20. Jahrhundert)
18. O'Neill, Norman (1875-1934)
19. Ongaro, Michele Dall' (born 1957)
20. Onslow, Georges (1784-1852)
21. Oppermann, Rüdiger (born 1954)
22. Opsahl, Josefine (born 1992)
23. Oram, Celeste (born 1990)
24. Orban, György (born 1947)
25. Orchesterwerke diverse
26. Ore, Cecilie (born 1954)
27. Orekhov, Sergei (1935-1998)
28. Oresic, Urska (born 1981)
29. Orff, Carl (1895-1982)
30. Orgelmusik
31. Orkin, Evgeni (born 1977)
32. Orlamünder, Johann (1815-1889)
33. Ornstein, Leo (1892-2002)
34. Ornstein, Maarten (born 1967)
35. O'Rourke, Aidan (born 1975)
36. Orr, Robin (1909-2006)
37. Orr, Buxton (1924-1997)
38. Orrego-Salas, Juan (1919-2019)
39. Orselli, Luigi (?? - 1879)
40. Orthel, Leon (1905-1985)