Registry
- Yo-Yo Ma (1955 - None)
- Walter Cecil Macfarren (1826 - 1905)
- Charles Mackerras (1925 - 2010)
- Gustav Mahler (1860 - 1911)
- Nicolas Malin (None - None)
- Yevgeny Malinin (1930 - 2001)
- Witold Maliszewski (1873 - 1939)
- Robin Mallapert (1538 - 1553)
- Francesco Manfredini (1684 - 1762)
- Ignác František Mara (1709 - 1783)
- Marin Marais (1656 - 1728)
- Benedetto Marcello (1686 - 1739)
- Adele Marcus (1906 - 1995)
- Władysława Markiewiczówna (1900 - 1982)
- Antoine François Marmontel (1816 - 1898)
- Antonin Marmontel (1850 - 1907)
- Frank Marshall (1883 - 1959)
- Martin Pierre Marsick (1847 - 1924)
- Giovanni Battista Martini (1706 - 1784)
- Giuseppe Martucci (1856 - 1909)
- Adolphe Marty (1865 - 1942)
- Joseph Marx (1882 - 1964)
- Eduard Marxsen (1806 - 1887)
- Lambert Massart (1811 - 1892)
- Jules Massenet (1842 - 1912)
- Georges Mathias (1826 - 1910)
- Stanislao Mattei (1750 - 1825)
- Tobias Matthay (1858 - 1945)
- Johann Mattheson (1681 - 1764)
- Neta Maughan (1938 - None)
- Ludwig Wilhelm Maurer (1789 - 1878)
- Jean-Pierre Maurin (1822 - 1894)
- Wilhelm Mayer (1831 - 1898)
- Alberto Mazzucato (1813 - 1877)
- Stephanie McCallum (1956 - None)
- Nikolai Medtner (1880 - 1951)
- Felix Mendelssohn (1809 - 1847)
- Martin-Joseph Mengal (1784 - 1851)
- Yehudi Menuhin (1916 - 1999)
- Joseph Merk (1795 - 1852)
- René Mesangeau (fl.1567 - 1638)
- Olivier Messiaen (1908 - 1992)
- Werner Meyer-Eppler (1913 - 1960)
- Giacomo Meyerbeer (1791 - 1864)
- Aleksander Michałowski (1851 - 1938)
- Arturo Benedetti Michelangeli (1920 - 1995)
- Karol Mikuli (None - None)
- Johann Peter Milchmeyer (1750 - 1813)
- Moritz Mildner (1812 - 1865)
- Darius Milhaud (1892 - 1974)
- Frank Miller (1912 - 1986)
- Russell King Miller (1871 - 1939)
- Nathan Milstein (1904 - 1992)
- Benno Moiseiwitsch (1890 - 1963)
- Jean-Joseph de Mondonville (1711 - 1772)
- Georg Matthias Monn (1717 - 1750)
- Antonio Montanari (1676 - 1737)
- Claudio Monteverdi (1567 - 1643)
- Hélène de Montgeroult (1764 - 1836)
- Giovanni Morandi (1777 - 1856)
- Ivan Moravec (1930 - 2015)
- Angelo Morigi (1725 - 1801)
- Francesco Morlacchi (1784 - 1841)
- Ignaz Moscheles (1794 - 1870)
- Konstantin Mostras (1886 - 1965)
- Moritz Moszkowski (1854 - 1925)
- Jean Mouton (c. 1459 - 1522)
- Charles Mouton (1617 - c.1699)
- Marcel Moyse (1889 - 1984)
- Wolfgang Amadeus Mozart (1756 - 1787)
- Franz Xaver Wolfgang Mozart (1791 - 1844)
- Leopold Mozart (1719 - 1787)
- Florica Musicescu (1887 - 1969)
- Gavriil Musicescu (1847 - 1903)
- Nikolai Myaskovsky (1881 - 1950)
- Joseph Daussoigne-Méhul (1790 - 1875)
- Nicolas Métru (c.1610 - 1668)
- Christian Gottlieb Müller (1800 - 1863)
- Emil Młynarski (1870 - 1935)