| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Bengt Olsen | Actor | 1898 | 1 | |||
| Mr. Ohde | Actor | 1898 | 1 | |||
| Mr. Ockert | Actor | 1898 - 1900 | 2 | |||
| Otto Oskar | Actor | 1898 - 1916 | 12 | |||
| Margarethe Otto-Körner | Actor | 1898 - 1929 | 13 | |||
| Alex Otto | Actor, Director, Playwright | 1898 - 1934 | 21 | |||
| Otto Ockert | Actor | 1899 | 1 | |||
| Paweł Owerłło | Actor | 1899 - 1905 | 2 | |||
| Harry Oscar | Director | 1900 | 1 | |||
| Theo Orth | Actor | 1900 | 1 | |||
| Franz Oehmig | Actor | 1900 | 1 | |||
| Mr Olivar | Actor | 1900 | 2 | |||
| Margarethe Ormond | Actor | 1900 - 1901 | 2 | |||
| Eugene Ormonde | Actor | 1900 - 1904 | 4 | |||
| Minna Ostheim | Actor | 1900 - 1908 | 4 | |||
| Nance O'Neil | Actor | 1900 - 1917 | 23 | 1 | ||
| M. Ol'čeva | Actor | 1900 - 1924 | 6 | |||
| Aksel Opsann | Actor | 1900 - 1928 | 66 | |||
| August Oddvar | Actor | 1900 - 1954 | 108 | 1 | ||
| Albert Olsen | Actor | 1901 | 6 | |||
| Marie Olsen | Actor | 1901 | 1 | |||
| Jadwiga Orwidowa | Actor | 1901 | 1 | |||
| Victor Ottmann | Translator | 1901 - 1902 | 9 | 2 | ||
| Alina(?) Orska | Actor | 1901 - 1903 | 2 | |||
| Rudolf Opel | Actor | 1901 - 1910 | 3 | |||
| Hertha Olden | Actor | 1902 | 2 | |||
| Hans Olsen | Actor | 1902 - 1903 | 17 | |||
| Federico Oliver | Director | 1902 - 1908 | 5 | |||
| Castora Ohlsen | Actor | 1902 - 1909 | 3 | |||
| Rasmus Ottesen | Actor | 1902 - 1926 | 18 | |||
| Thomas Oikonomou | Actor, Director | 1902 - 1926 | 121 | |||
| Marta Ozoliņa | Actor | 1903 | 1 | |||
| Elita Proctor Otis | Actor | 1903 | 13 | |||
| Janusz Orliński | Actor | 1903 - 1909 | 4 | |||
| Pavel Orlenev | Actor, Director | 1903 - 1923 | 14 | 1 | ||
| Helen Ormbee | Actor | 1904 | 1 | |||
| Jane Oaker | Actor | 1904 | 1 | 1 | ||
| Kathleen O'Neill | Actor | 1904 | 1 | |||
| Władysława Ordonówna | Actor | 1904 | 1 | |||
| Anna Oehlschläger | Actor | 1904 - 1908 | 2 | |||
| Hans Oberländer | Director | 1904 - 1908 | 2 | |||
| Janusz Orliński | Actor | 1904 - 1916 | 9 | |||