Name
- Ireland, John Nicholson, composer and pianist, 1879-19621
- Irving, Robert, conductor, 1913-19911
- J. W. Chester Ltd, music publishers, 1874-1
- Johannes Oertel, music publishers and theatrical distributors of Berlin, fl 1943-19611
- John Curwen and Sons, Ltd, music publishers, 1897-19691
- King, Alexander, music librarian, 1911-19941
- Korea Music Company, fl 1957-19601
- Korn, Barbara, wife of Peter Jona Korn, d c 20131
- Korn, Peter Jona, composer, 1922-19981
- Kovàch, Andor, composer, 1915-2005, http://viaf.org/viaf/26669591
- Krause, Ernst, German musicologist, 1911-1997, http://isni.org/isni/000000...1
- Księgarnia Gebethnera i Wolffa, of Warsaw, music dealers and booksellers, 1857-19731
- Kubinyi, Attila, violinist, fl 19591
- Kupkovič, Ladislav, Slovak composer and conductor, 1936-2016, http://isni.org/isni/000000...1
- Kurtz, Efrem, Russian conductor, 1900-1995, http://isni.org/isni/000000...1
- Limbach, Reinhard, correspondent of Boosey and Hawkes Ltd., fl 1956-19591
- Lopis, Francisco, correspondent of Boosey and Hawkes Ltd., fl 1947-19481
- Lothar, Mark, German composer, 1902-1985, http://isni.org/isni/000000...1
- Lowe and Brydone Ltd., printers of London, fl 1939-19611
- Löffler, Willi, German conductor and composer, 1915-2000, http://viaf.org/viaf/796266141