- Jacob, Gordon (1895-1984)
- Jadin, Louis Emmanuel (1768-1853)
- James, William Garnet (1892-1977)
- Janáček, Leos (1854-1928)
- Janitsch, Johann Gottlieb (1708-1763)
- Janssens, Robert (*1939)
- Jardanyi , Pal (1920-1966)
- Jarnach, Philipp (1892-1982)
- Järvlepp, Jan (*1953)
- Jeanjean, Paul (1874-1928)
- Jeney, Zoltán (1915-1981)
- Jenö, Gaál (1906-1980)
- Jensen, Niels Peter (1802-1846)
- Jentzsch, Wilfried (*1941)
- Jettel, Rudolf (1903-1981)
| - Jobim, Antonio Carlos
- Johannsen, Kay (*1961)
- John, Elton
- Jolas, Betsy (*1926)
- Jolivet, André (1905-1974)
- Jommelli, Niccoló (1714-1774)
- Jones, Edward Huws (*1948)
- Jones, Frances
- Jones, Martin
- Jones, Mason
- Jongen, Joseph (1873-1953)
- Joplin, Scott (1868-1917)
- Josephs, Wilfred (1927-1997)
- Joubert, Claude-Henry
- Juon, Paul (1872-1940)
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