Name
- London Philharmonic Orchestra, 1932-1
- Mairants, Ivor, classical and jazz guitarist, 1908-19981
- Maison de Musique Huni, of Zürich; music dealers, fl 1944-19571
- Mar, Norman, conductor, 1919-19941
- Marion, André, husband of Maria Milena Marion, fl 19631
- Marion, Maria Milena, daughter of Igor Stravinsky, b 1914, http://isni.org/isni/000000...1
- Markevitch, Igor, French composer and conductor, 1912-1983, http://isni.org/isni/000000...1
- Mayer, Robert, Knight, music patron, 1879-19851
- Małcużyński, Witold, Polish pianist, 1914-1977, http://isni.org/isni/000000...1
- McAllister, Gilbert, journalist and Member of Parliament, 1906-1964, http://isni.org/isni/000000...1
- McCredie, Andrew Dalgarno, Australian musicologist, 1930-20061
- Mechanical-Copyright Protection Society Ltd, 1924-1
- Metropolitan Opera, New York, United States, 1883-1
- Meulenhoff, of Amsterdam; music dealers, 1895-1
- Miller, Alan, of Grimsby, music librarian, b 19261
- Minchinton, John, conductor, fl 1940-19611
- Molenaar Edition, Dutch music publishers, 1933-1
- Moxey, George, Jamaican pianist, 1914-1984, http://isni.org/isni/000000...1
- Mundy, John, cellist, 1886-19711
- Music Publishers' Association, United Kingdom, 1881-1