Name  | active from | active to | |
| Mamut | | |  |
| Mandrage | 2001 | | |
| Mangelsdorff-Dauner | | | |
| Maniac Butcher | 1992 | 2000 | |
| Mann, Zdenek | | | |
| Manon | | | |
| Manzele | 1982 | 1985 | |
| Mao | | | |
| Maraca | 2000 | | |
| Maresova, Iva | | | |
| Markova, Eva | 1960 | | |
| Markytan, Karel | | | |
| Markyz John | 1967 | | |
| Marlene | 1984 | 1990 | |
| Marno Union | 1982 | 1984 | |
| Marsyas | 1973 | | |
| Marsalkova, Helena | 1970 | | |
| Martha a Tena Elefteriadu | 1968 | | |
| Martin, Milan | 1960 | | |
| Martincova Elena | 1984 | 1986 | |
| Martinova, Eva | 1956 | | |
| Martinova, Vera | 1978 | | |
| Marton, Rony | 1971 | 1985 | |
| Mashy Muxx | 1993 | | |
| Master's Hammer | 1987 | | |
| Matadors | 1965 | 1970 | |
| Matkovia | 1982 | 1986 | |
| Matuska, Waldemar | 1954 | 2009 | |
| Matyas Gali | | | |
| Matysova, Jana | 1971 | | |
