Name
- Inter-American Institute of Musicology, 1938-1
- J. R. Lafleur Ltd., of London; instrument makers, fl 1947-19571
- Jacob Jørgensen, of Amsterdam and Aarhus; music dealers and publishers, fl 1947-19571
- Jalas, Jussi, Finnish conductor and composer, 1908-1985, http://isni.org/isni/000000...1
- Janowitzer, Erwin, correspondent of Boosey and Hawkes Ltd., fl 1947-19481
- Jefferson, Leslie, correspondent of Boosey and Hawkes Ltd., fl 1947-19481
- Jochum, Eugen, conductor, 1902-1987, http://isni.org/isni/000000...1
- Jong, Martin F., of Hillegersberg; correspondent of Boosey and Hawkes Ltd., fl 1947-19481
- Kaabers, of Aarhus, Denmark; music publishers, fl 1947-19611
- Kalmus, Alfred August Uhlrich, music publisher, 1889-1972, http://viaf.org/viaf/3051186551
- Kammen, Alec, of Groningen; Dutch bandmaster, fl 1947-19571
- Karajan, Herbert, conductor, 1908-1989, http://isni.org/isni/000000... http://viaf.org/viaf/876531071
- Keeton, A. E., writer on music, fl 1900-19551
- Krannhals, Alexander, Swiss conductor, 1908-1961, http://isni.org/isni/000000...1
- Kunzelmann, Albert, of Apollo-Verlag, Zürich, b 19201
- Lang, Walter, Swiss composer, 1896-19661
- Lange, Francisco Curt, musicologist, 1903-1997, http://isni.org/isni/000000...1
- Langley and Sons, printers and stationers, 1860-1
- Langley, Leonard C., correspondent of Boosey and Hawkes Ltd., fl 1947-19481
- Laurie, James, press and publicity officer, Royal Festival Hall, fl 1947-19581