Composers
| Composer name | Year of Birth | Death | Compositions in database |
|---|---|---|---|
| Jonák, Zdeněk | 1917 | 1995 | 35 |
| Juchelka, Miroslav | 1922 | 2001 | 48 |
| Junk, Petr | 1944 | 2 | |
| Jurišová, Zlatica | 1968 | 15 | |
| Jurkovič, Pavel | 1933 | 2015 | 1 |
| Jurovský, Šimon | 1912 | 1 | |
| Juřica, Leon | 1935 | 2014 | 49 |
| Juza, Jan | 1979 | 6 | |
| Kabát, Jiří M. V. | 8 | ||
| Kabeláč, Miloslav | 1908 | 1979 | 55 |
| Kačo, Tomáš | 3 | ||
| Kadeřábek, Jiří | 1978 | 30 | |
| Kadlčík, Ladislav | 2003 | 4 | |
| Kachlová, Martina | 1990 | 7 | |
| Kainar, Josef | 1917 | 1971 | 1 |
| Kajstura, Ladislav | 1927 | 2003 | 10 |
| Kalabis, Viktor | 1923 | 2007 | 94 |
| Kalach, Jiří | 1934 | 2008 | 30 |
| Kalach, Josef | 1901 | 1967 | 6 |
| Kalaš, Julius | 1902 | 1967 | 21 |