| * | Laaksonen, Petri (Finland) b.1962 |
| Labarsouque, Alain (仏) b.1956 |
| Labinski, A.I. (露) ?-? |
| Lacerda, Osvaldo (Brazil) 1927-2011 |
| * | Lachenmann, Helmut (独) b.1935 |
| Lachner, Franz (Germany) 1803-1890 |
| Lachner, Vinzenz (オーストリア) 1811-1893 |
| Lacombe, Hervé (France) b.1963 |
| La Cour, Niels (デンマーク) b.1944 |
| Ladmirault, Paul (仏) 1877-1944 |
| Laethén, Rafael (Finland) 1845-1898 |
| La Hèle, George de (Franco-Flemish) 1547-1586 |
| Lahusen, Christian (独) 1886-1975 |
| Lai, Juliette (マレーシア) b.1943 |
| * | Laitman, Lori (U.S.A.) b.1955 |
| Lajtha, László (ハンガリー) 1892-1963 |
| Lallement, Bernhard (France) b.1936 |
| La Maistre, Mattheus (Belgium) c.1505-1549 |
| La Moeulle, Guillaume de (France) 16th cent. |
| Lambrechts, Jean (Belgium) b.1936 |
| Landini, Francesco (Italy) 1325頃-1397 |
| * | Lang, David (米) b.1957 |
| Lang, Hans (独) 1897-1968 |
| Lang, Rupert (Canada) b.1948 |
| Långbacka, Ulf (Finland) b.1957 |
| Lange, Daniël de (Netherlands) 1841-1918 |
| * | Lange, Kinley (U.S.A.) b.1950 |
| Lange, Martin (独) b.1921 |
| Lange-Müller, Peter Erasmus (デンマーク) 1850-1926 |
| Langenau, Leonhard von (Germany) 1515?-1534? |
| * | Langgaard, Rued (Denmark) 1893-1952 |
| * | Langlais, Jean (France) 1907-1991 |
| * | Länsiö, Tapani (Finland) b.1953 |
| Lányi, Ernö (Hungary) 1861-1923 |
| Łapiński, Dariusz (Poland) b.? |
| * | Larsen, Libby (U.S.A.) b.1950 |
| Larsson, Lars-Erik (スウェーデン) 1908-1986 |
| La Rue, Pierre de (ネーデルランド) 1460頃-1518 |
| * | Lasser, Philip (U.S.A.) b.1963 |
| Lasso, Orlando di (ネーデルランド) 1532-1594 |
| Latona, Peter (米) b.1968 |
| Lau, Heinz (Germany) 1925-1975 |
| Laub, Thomas (デンマーク) 1852-1927 |
| * | Lauridsen, Morten (U.S.A.) b.1943 |
| * | Lavino, James (U.S.A.) b.1973 |
| Lawes, William (U.K.) 1602-1645 |
| * | Lawson, Philip (U.K.) b.1957 |
| Layton, Billy Jim (U.S.A.) 1924-2004 |
| * | Lazarof, Henri (ブルガリア) b.1932 |
| * | Leach, Mary Jane (米) b.1949 |
| Leaf, Robert (米) b.1936 |
| * | LeBaron, Anne (U.S.A.) b.1953 |
| * | Lebič, Lojze (スロベニア) b.1934 |
| Le Blanc, Didier (France) fl.1578-1584 |
| Lechner, Leonhard (オーストリア->独) c.1553-1606 |
| Lechthaler, Josef (Austria) 1891-1948 |
| Ledesma, Nicolás de (スペイン) 1791-1883 |
| * | Ledger, Philip (U.K.) 1937-2012 |
| Lee, K.Y. (Korea) b.? |
| * | Leek, Stephen (オーストラリア) b.1959 |
| * | de Leeuw, Ton (Netherlands) 1926-1996 |
| * | Lefèbvre, Claude (仏) b.1931 |
| * | Le Flem, Paul (France) 1881-1984 |
| Leguizamón, Gustavo (アルゼンチン) ?-2000 |
| Lehár, Franz (Germany) 1870-1948 |
| Lehtinen, Rauno (Finland) b.1932 |
| Leibowitz, René (ポーランド) 1913-1972 |
| * | Leifs, Jon (アイスランド) 1899-1968 |
| Leigh, Mitch (U.S.A.) b.1928 |
| * | Leighton, Kenneth (英) 1929-1988 |
| Leijon, Jerker (スウェーデン) b.1956 |
| Leisring, Volckmar (スウェーデン) 1590頃-1637 |
| Leite, Marcos (Brazil) 1953-2002 |
| Le Jeune, Claude (仏) 1528-1600 |
| Lekberg, Sven (米) 1899-1984 |
| Lemacher, Clemens (Germany) 1864-1926 |
| Lemacher, Heinrich (Germany) 1864-1926 |
| Lemlin, Lorenz(独) 1496頃-1549 |
| Lendvai, Erwin (独) 1882-1949 |
| Lendvay, Kamilló (ハンガリー) b.1928 |
| * | Lennon, John (U.K.) 1940-1980 |
| Lenselink, Harold (蘭) b.1952 |
| * | Lentz, Daniel (U.S.A.) b.1942 |
| Lentz, Edmond (Luxembourg) 1852-1899 |
| Leoncavallo, Ruggiero (伊) 1858-1919 |
| 梁榮平 [Leong, Yoon Pin] (Singapore) b.1931 |
| Леонтович, Микола [Leontovych, Mykola] (Ukraina) 1877-1921 |
| Lerer, Oded (Israel) b. |
| Lesjak, Borut (Slovenia) 1931-1995 |
| Lessky, Friedrich (Austria) b.1934 |
| L'Estrange, Alexander (英) b.1974 |
| Leuner, Karl (独) ?-? |
| Levi, Paul Alan (米) b.1941 |
| * | Lévinas, Michaël (France) b.1949 |
| Levy (Betove), Michel-Maurice (仏) 1884?-1965 |
| Lewis, Geraint (U.K.) b.1958 |
| * | Lewkovitch, Bernhard (Denmark) b.1927 |
| Ley, Henry G. (英) 1887-1962 |
| Liadov, Anatoly (露) 1855-1914 |
| Līcīte, Paula (ラトヴィア) 1889-1966 |
| Liddle, Elizabeth (英) b.1952 |
| Lidholm, Ingvar (Sweden) b.1921 |
| de Lienas, Juan (メキシコ) 17世紀中頃 |
| Lier, Bertus van (蘭) 1906-1972 |
| * | Ligeti, György (Hungary->Austria) 1923-2006 |
| Liimola, Heikki (Finland) b.1958 |
| Queen Liliuokalani (Hawaii) 1838-1917 |
| Liljefors, Ruben (Sweden) 1871-1936 |
| Liljeholm, Thomas (Sweden) b.1944 |
| Linda, Solomon (South African, Zulu) 1909-1962 |
| * | Lindberg, Christian (Sweden) b.1958 |
| Lindberg, Nils (Sweden) b.1933 |
| Lindberg, Olle (Sweden) b.1967 |
| Lindberg, Oskar (Sweden) 1887-1955 |
| * | Lindberg, Staffan (Sweden) b.1966 |
| Lindblad, Adolf Fredrik (Sweden) 1801-1878 |
| Lindblad, Otto (Sweden) 1809-1864 |
| Lindhjem, Nils (ノルウェー) b.? |
| Lindley, Simon (英) b.1948 |
| Linjama, Jouko (フィンランド) b.1934 |
| Linkola, Jukka (フィンランド) b.1955 |
| Linnala, Eino (フィンランド) 1896-1973 |
| Linsén, Gabriel (Finland) 1838-1914 |
| * | Lischka, Rainer (Germany) b.1942 |
| de Lisle, Claude Joseph Rouget (France) 1760-1836 |
| * | Lister, Rodney (U.S.A.) b.1951 |
| Lisznyai, Gábor (Hungary) 1913-1981 |
| Liszt, Ferenc (ハンガリー) 1811-1886 |
| Littel, Manuel Massotti (Spain) 1915-1999 |
| Lladó, Miguel Angel Martin(スペイン) b.1950 |
| Lockwood, Normand (U.S.A.) 1906-2002 |
| Loesser, Frank (U.S.A.) 1910-1969 |
| Loewe, Carl (独) 1796-1869 |
| Loewe, Frederick (Austria->U.S.A.) 1901-1988 |
| Lole, Simon (UK) b.1957 |
| Lomakhin, Gavriil (露) 1811-1885 |
| London, Edwin (U.S.A.) 1929-2013 |
| 周龍 [Long, Zhou] (China) b.1953 |
| Loosemore, Henry (英) 1600-1670 |
| Lopes-Graça, Fernando(ポルトガル) 1906-1994 |
| López-Gavilán, Guido (キューバ) b.1944 |
| Lord, David (英) b.1944 |
| * | Lorentzen, Bent (Denmark) b.1935 |
| * | Lorentzen, Jakob (Denmark) b.1968 |
| Lortzing, Albert (独) 1801-1851 |
| Lotti, Antonio (伊) 1667頃-1740 |
| Louie, Alexina (カナダ) b.1949 |
| Lourié, Arthur (露) 1892-1966 |
| Luboff, Norman (U.S.A.) 1917-1987 |
| Luchterhandt, Hinrich (独) b.1928 |
| * | Lucier, Alvin (U.S.A.) 1931-2021 |
| * | Łuciuk, Juliusz (Poland) b.1927 |
| Lüdig, Mihkel (エストニア) 1880-1958 |
| Luengen, Ramona (カナダ) b.1960 |
| Luening, Otto (米) 1900-1996 |
| Lukačić, Ivan (Croatia) 1584-1648 |
| * | Lukáš, Zdeněk (Czech) 1928-2007 |
| Łukaszewski, Marcin (Poland) b.1972 |
| * | Łukaszewski, Paweł (Poland) b.1968 |
| Lukowsky, Rolf (独) b.1926 |
| Lully, Jean-Baptiste (伊->仏) 1632-1687 |
| Lundén, Lennart (スウェーデン) 1914-1966 |
| Lundin, Bengt (スウェーデン) b.1945 |
| Lundmark, Arne (Sweden) b.? |
| Lundquist, Torbjorn Iwan (スウェーデン) 1920-2000 |
| Lundvik, Hildor (スウェーデン) 1885-1951 |
| Lupi second, Didier (France) c.1510/1520-1559? |
| Luther, Martin (独) 1483-1546 |
| Luther, Martti (フィンランド) ?-? |
| Lutkin, Peter Christian (米) 1858-1931 |
| * | Lutoslawski, Witold (ポーランド) 1913-1994 |
| Lutyens, Elisabeth (英) 1906-1983 |
| * | Lutz, Martin (Denmark) b.1974 |
| Luzzaschi, Luzzasco (伊) 1545-1607 |
| Lvov, Aleksei (露) 1798-1870 |
| Lyra, Justus Wilhelm (独) 1822-1882 |
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