Composers by O
- Olausson, Einar
- Olbersleben
- Olbrich
- Olbrich, Arthur
- Olbrich, E.
- Olbrich, Emil
- Olbrich, F.
- Olbrich, Flor.
- Olbrich, Fr.
- Olbrich, P.
- Olbrich, R.
- Olczewski, H.
- Oldehaver, Th.
- Olden, Richard
- Oldendorf, H.
- Oldrich, Hemerka
- Oldrini
- Oldrini, Giov.
- Oldrini, J.
- O’Leary, A.
- O’Leary, Arthur
- Olga, Grossfürstin von Russland
- Oliphant, Lilian Blair
- Oliver, Charlotte M.E.
- Oliver, M.
- Oliver, Mary
- Olivier, A.
- Olivier, d’Aug.
- Olivier, F.
- Olivieri, A.
- Olk, Hugo
- Ollivier, H.
- Olma, Charles
- Olsen, Ole