| Verfasser | Häufigkeit |
| Olshausen, Eckart 1938- |
509 |
| O'Neill, Eugene 1888-1953 |
490 |
| Ormandy, Eugene 1899-1985 |
431 |
| Safari, an O'Reilly Media Company |
396 |
| Mozart, Wolfgang Amadeus 1756-1791 |
395 |
| The Philadelphia Orchestra |
349 |
| Oettinger, Eduard Maria 1808-1872 |
337 |
| Oberhummer, Eugen 1859-1944 |
319 |
| Orzeszkowa, Eliza 1842-1910 |
318 |
| Offenbach, Jacques 1819-1880 |
295 |
| Wagner, Richard 1813-1883 |
293 |
| Ernst, Otto |
246 |
| Hartleben, Otto Erich 1864-1905 |
226 |
| Ovidius Naso, Publius v43-17 |
224 |
| Svensson, Lars E. O. 1947- |
220 |
| Strauss, Richard 1864-1949 |
216 |
| Bach, Johann Sebastian 1685-1750 |
210 |
| Holder-Egger, Oswald 1851-1911 |
201 |
| Orton, Eric |
199 |
| Schwarzkopf, Elisabeth 1915-2006 |
199 |