Composers by O
- Osborne
- Osborne, G.A.
- Osborne, G.O.
- Osburg, W.
- Osburg, Wilhelm
- Oscar v. Schweden
- Oscar, J.C.
- Oser, Fr.
- Oser, J.
- Osers, Maxmilian
- Osgood, George L.
- Oslislo, Josef
- Osmanski, W.
- Osmond, Comte d’
- Osmund, Ben.
- Osolsobie, Sofie v.
- Osorno, Jacinto
- Ossaus, D.L.
- Ossiier, Jul.
- Ossipoff, V.
- Ost
- Ostaschevski, Gust.
- Osten, Fr. v.
- Osten, Julius
- Osten-Sacken, M. de
- Oster, Leop.
- Osterbind, J.B.
- Osterley, H.
- Ostermeyer, E.
- Ostermeyer, M.
- Ostertag, C.
- Osthoff, H.
- Ostlere, May
- Ostner, Mathilde
- Ostrowski, Jan
- Osumbor, A.
- Oswald, H.
- Oswald, R.