Name
- London Bach Group, 1957-19611
- Mairants, Ivor, classical and jazz guitarist, 1908-19981
- Malmström, of Malmö; music dealers, fl 1956-19591
- Mandikian, Arda, singer, 1924-2009, http://isni.org/isni/000000...1
- Markevitch, Igor, French composer and conductor, 1912-1983, http://isni.org/isni/000000...1
- Maros, Rudolf, Hungarian composer, 1917-1982, http://isni.org/isni/000000...1
- Marshall, Geoffrey R., correspondent of Boosey and Hawkes Ltd., fl 1957-19591
- Marshall, H. F., correspondent of Boosey and Hawkes Ltd., fl 1957-19591
- Mason, Kenneth J., correspondent of Boosey and Hawkes Ltd., fl 1957-19591
- Matsuo Music Company, of Tokyo, fl 1952-19581
- Mayer, Robert, Knight, music patron, 1879-19851
- McNulty, Daniel, Irish composer, 1920-19961
- Mihule, Jiří, Czech oboist and music teacher, b 19371
- Minchinton, John, conductor, fl 1940-19611
- Molenaar Edition, Dutch music publishers, 1933-1
- Music and Art Teaching Center, of Beirut, fl 1957-19591
- Musica Rara, publishing firm, fl 1957-19611
- Musička Naklada, music publishing house, of Zagreb, fl 1956-19591
- Mussington, William, correspondent of Boosey and Hawkes Ltd., fl 1957-19591
- Möseler Verlag, of Wolfenbüttel; music publishers, fl 1954-19591