Name
- 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
- Müller und Schade, of Bern; Swiss music publishers, 18501
- National Music Council of Great Britain, 1953-1
- New York Concert Symphony Orchestra, fl 1965-19661
- Page, Frederick Joseph, pianist and writer on music, 1905-1983, http://viaf.org/viaf/213151311
- Panufnik, Andrzej, Knight, composer and conductor, 1914-1991, http://isni.org/isni/000000...1
- Performing Right Society, 1914-19971