Kniesel, Franz (1865-1926). Born in Bucharest. Engaged as concert master of the Boston Symphony Orchestra in 1885 and led the Kneisel String Quartet (1886-1917). From 1905 he taught the violin at the Institute of Musical Art in New York.
Kochański, Pawel (1887-1934). Polish violinist, teaching at Warsaw and St Petersburg Conservatoires. Left Russia, reaching America in 1921, and taught at the Juilliard School in New York.
Kolisch String Quartet. Formed in 1922 by the Austrian-born violinist Rudolph Kolisch. Advocates for the chamber music of the Second Viennese School. Bartók's Fifth Quartet is dedicated not only to Mrs Coolidge but also to the quartet.
Koussevitzky, Sergey (1874-1951). Born in Russia, and emigrating to America, conducted the Boston Symphony Orchestra, 1924-49. Commissioned many contemporary works, including Stravinsky's Symphony of Psalms and Britten's Peter Grimes.
Kroll, William (1901-1980). American violinist, specializing in chamber music. First violinist in the Coolidge String Quartet, 1936-44, and the Kroll Quartet, 1944-69.
Lara, Isidore de (1858-1935). English pianist and composer of songs and operas. Organized chamber and orchestral concerts in London.
Lauricella, Remo (1912-2003). English violinist and composer of Italian parentage. Fellow student of Britten, with whom he played chamber music. Subsequently member of such orchestras as the London Philharmonic and London Symphony.
London String Quartet. English quartet founded in 1908 by Charles Warwick-Evans (cello), with Albert Sammons and Thomas Petrie (violins) and H Waldo Warner (viola). Enthusiastic supporters of contemporary British composers.
Long, Kathleen (1896-1968). English pianist, a distinguished interpreter of Mozart, Debussy, Ravel and Fauré. Duo partnership with Brosa, 1948-66.
Mackenzie, Sir Alexander (1847-1935). Scottish composer, conductor and music administrator. Principal of the Royal Academy of Music, London, 1888-1924.