| Malmgreen, Olaf, | Olaf Malmgreen | Actor | 1901 | 6 | |
| Mølbach, Christian, | Christian Mølbach | Actor | 1901 | 1 | |
| Mietle, Benny, | Benny Mietle | Actor | 1901 | 1 | |
| Morozowicz, Rufin(?), | Rufin(?) Morozowicz | Actor | 1901 | 1 | |
| Matuszewski, -, | - Matuszewski | Actor | 1901 | 1 | |
| Morzkowski, -, | - Morzkowski | Actor | 1901 | 1 | |
| Merito, Ada | Ada Merito | Actor | 1901 | 1 | |
| Marian, B. | B. Marian | Translator | 1901 | 2 | |
| Massalitinov, N., | Nikolaj O. Massalitinov (N. Massalitinov) | Actor, Director | 1900 - 1939 | 10 | |
| Marlow, Heinrich, | Heinrich Marlow | Actor | 1900 - 1933 | 7 | |
| Murphy, John Daly | John Daly Murphy | Actor | 1900 - 1929 | 5 | |
| Munt, E., | E. Munt | Actor | 1900 - 1924 | 5 | |
| Meyerhold, Vsévolod Èmíl'evič | Vsévolod Èmíl'evič Meyerhold (Vsévolod Èmíl'evič Meyerhold) | Actor, Adaptation, Designer, Director | 1900 - 1924 | 37 | |
| Massenet, Jules, | Jules Massenet | Composer | 1900 - 1917 | 4 | |
| Möller, Mr., | Mr. Möller | Actor | 1900 - 1914 | 5 | |
| Mann-Bouwmeester, Theo, | Theo Mann-Bouwmeester | Actor | 1900 - 1914 | 5 | |
| Maurer, Marie, von | Marie von Maurer | Actor | 1900 - 1912 | 4 | |
| Morska-Popławska, Gabriela, | Gabriela Morska-Popławska | Actor | 1900 - 1908 | 7 | |
| Mährdel, Emil, | Emil Mährdel | Actor | 1900 - 1904 | 11 | |
| Martini, Willy, | Willy Martini | Actor, Director | 1900 - 1904 | 4 | |
| Morozowicz, Henryk, | Henryk Morozowicz | Actor, Director | 1900 - 1904 | 2 | |
| Mayer, Hans, | Hans Mayer | Actor | 1900 - 1902 | 8 | |
| Muratova, E., | E. Muratova | Actor | 1900 - 1901 | 2 | |
| Mehner, Adolf, | Adolf Mehner | Actor | 1900 | 1 | |
| Marton, Rosa, | Rosa Marton | Actor | 1900 | 1 | |
| Meltzer, Charles Henry, | Charles Henry Meltzer (Charles Henry Meltzer) | Director | 1900 | 1 | |
| Mebus, Eduard | Eduard Mebus | Actor | 1900 | 1 | |
| Mauren, Otto | Otto Mauren | Actor | 1900 | 1 | |
| Müller, Bertha | Bertha Müller | Actor | 1900 | 2 | |
| Marsky, Richard | Richard Marsky | Actor | 1900 | 1 | |
| Meier, Franz | Franz Meier | Actor | 1900 | 1 | |
| Magener, Karl | Karl Magener | Actor | 1900 | 1 | |
| Morgenstern, Christian, | Christian Morgenstern | Translator | 1899 - 2019 | 382 | 1 |
| Mowinckel, Agnes, | Agnes Mowinckel | Actor, Director | 1899 - 1959 | 135 | |
| Marrené-Morzkowska, Waleria, | Waleria Marrené-Morzkowska | Translator | 1899 - 1958 | 14 | |
| Montor, Max, | Max Montor | Actor, Director | 1899 - 1931 | 27 | |
| Moskvin, Ivan, | Ivan Moskvin | Actor | 1899 - 1924 | 9 | |
| Mayr, Ludwig, | Ludwig Mayr | Actor | 1899 - 1923 | 2 | |
| Mikulski, Józef, | Józef Mikulski | Actor | 1899 - 1911 | 3 | |
| Majchrzycka, Wanda, | Wanda Majchrzycka | Actor | 1899 - 1905 | 2 | |
| Madsen, Carl, | Carl Madsen | Actor | 1899 - 1904 | 12 | |
| Małkowski, -, | - Małkowski | Actor | 1899 | 1 | |
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