| Aagaard, Thorvald (Denmark) 1877-1937 |
| * | Aagaard-Nilsen, Torstein (Norway) b.1964 |
| Aaltoila, Heikki (Finland) 1905-1992 |
| * | Aamodt, Valter (Norway) 1902-1989 |
| Aas, Else Berntsen (Norway) 1922-2009 |
| Abba, Eden (U.S.A.) 1908-1995 |
| 安部幸明 [ABE, Koumei] (Japan) 1911-2006 |
| 阿部亮太郎 [ABE, Ryotaroh] (Japan) b.1962 |
| Ābele, Ādolfs (Latvia) 1889-1967 |
| Åberg, Jan Håkan (Sweden) 1916-2012 |
| Åberg, Mats (Sweden) b.1943 |
| * | Ablinger, Peter (Austria) b.1959 |
| * | Abrahamsen, Hans (Denmark) b.1952 |
| Abril, Antón García (Spain) b.1933 |
| Absil, Jean (Belgium) 1893-1974 |
| Abt, Franz (Germany) 1819-1885 |
| Abu-Khader, Shireen (Jordan) b.1972 |
| Acilu, Agustín González (Spain) b.1929 |
| Adam, Adolphe-Charles (France) 1803-1856 |
| Adam de la Halle (France?) 1240-1285/1304 |
| Ádám Jenő (Hungary) 1896-1982 |
| Adam, Karl Ferdinand (Germany) 1806-1867 |
| Adams, A. Emmett (U.K.) 1889-1938 |
| Adams, Lydia (Canada) b.1953 |
| Adams, Thomas (U.K.) 1785-1858 |
| * | Adés, Thomas (U.K.) 1971 |
| * | Adler, Samuel (Germany->U.S.A.) b.1928 |
| Adolphson, Olle (Sweden) 1934-2004 |
| Agerby, Aksel (Denmark) 1889-1942 |
| Agnestig, Carl-Bertil (Sweden) 1924-2019 |
| Agostini, Paolo (Italy) 1593-1629 |
| Aguiar, Ernani Henrique Chaves (Brazil) b.1950 |
| * | Aguilar, María del Carmen (Argentina) b.1945 |
| Åhlén, Waldemar (Sweden) 1894-1982 |
| Ahlin, Sven (Sweden) b.1951 |
| Aho, Kalevi (Finland) b.1949 |
| Aichinger, Gregor (Germany) 1564-1628 |
| * | Aitken, Robert (Canada) b.1939 |
| 相澤直人 [AIZAWA, Naoto] (Japan) b.1978 |
| Åkerblom Nielsen, Nina (Sweden) b.1980 |
| * | アンジェラ・アキ [AKI, Angela] (Japan) b.1977 |
| 芥川也寸志 [AKUTAGAWA, Yasushi] (Japan) 1925-1989 |
| * | Alain, Jehan (France) 1911-1940 |
| Ala-Pöllänen, Kari (Finland) b.1940 |
| Albéniz, Isaac (Spain) 1860-1909 |
| Albert, Heinrich (Germany) 1604-1651 |
| Albrici, Vincenzo (Italy) 1631-1696 |
| Albright, William (U.S.A.) 1944-1998 |
| * | Alcala II, Nilo Belarmino (Phillippines) b.1978 |
| * | Alcaraz, Albert (Spain) b.1978 |
| Aldema, Gil (Israel) 1928-2014 |
| Aleksandrov, Aleksandr (Russia) 1883-1946 |
| Aleotti, Vittoria (Italy) 1570-1594 |
| * | Alfvén, Hugo (Sweden) 1872-1960 |
| * | Allain, Richard (U.K.) b.1965 |
| Alldahl, Per-Gunnar (Sweden) b.1943 |
| Allegri, Gregorio (Italy) 1582-1652 |
| Аллеманов, Прот. Дмитрий [Allemanov, Archpriest Dmitry] (Russia) 1867-ca.1918 |
| Aller, H. (U.S.A.?) ?-? |
| Allgén, Claude Loyola (Sweden) 1920-1990 |
| Almandoz, Norberto (Spain) 1893-1970 |
| Almås, Per Inge (Norway) b.1947 |
| Almqvist, Carl Jonas Love (Sweden) 1793-1866 |
| Alnaes, Eyvind (Norway) 1872-1932 |
| Alonso-Crespo, Eduardo (Argentina) b.1956 |
| Алябьев, Александр [Alyabiev, Alexander] (Russia) 1787-1851 |
| 雨宮伊之助 [AMEMIYA, Inosuke] (Japan) 1925-1989 |
| Ames, Jeffrey L. (U.S.A.) b.1969 |
| * | 網守将平 [AMIMORI, Shōhei] (Japan) b.1990 |
| 網代栄三 [AMISHIRO, Eizoh] (Japan) b.1914 |
| * | Amlin, Martin (U.S.A.) b.1953 |
| Amos, Keith (U.K.) b.1939 |
| * | Amram, David (U.S.A.) b.1930 |
| * | Amy, Gilbert (France) b.1936 |
| Am Zallag, Avi-Eilam (Israel) b.1941 |
| Anderson, Julian (U.K.) b.1967 |
| Anderson, Leroy (U.S.A.) 1908-1975 |
| Anderssen, Fridthjov (Norway) 1876-1937 |
| 安藤由布樹 [ANDOH, Yuhki] (Japan) b.1961 |
| Andreo, Dante (Spain) b.1949 |
| * | Andriessen, Hendrik (Netherlands) 1892-1981 |
| * | Andriessen, Jurriaan (Netherlands) 1925-1996 |
| * | Andriessen, Louis (Netherlands) b.1939 |
| Andriessen, Willem (Netherlands) 1887-1964 |
| Anerio, Felice (Italy) ca.1560-1614 |
| Anerio, Giovanni Francesco (Italy) 1567-1630 |
| Anschütz, Ernst (Germany) 1780-1861 |
| Antes, John (U.S.A.) 1740-1811 |
| * | Antognini, Ivo (Swiss) b.1963 |
| 青木八郎 [AOKI, Hachiro] (Japan) 1919-2014 |
| 青木肇 [AOKI, Hajime] (Japan) b.? |
| 青木暢男 [AOKI, Nobuo] (Japan) b.1920 |
| * | 青島広志 [AOSHIMA, Hiroshi] (Japan) b.1955 |
| 青山義久 [Yoshihisa AOYAMA] (Japan) b.? |
| * | Aperghis, Georges (Greece->France) b.1945 |
| Apostel, Hans Erich (独) 1901-1972 |
| Appenzeller, Benedictus (Franco-Flemish) 1480/1488-after 1558 |
| * | Aquilanti, Giancarlo (Italy) b.1959 |
| * | 新井満 [ARAI, Man] (Japan) b.1946 |
| 荒木とよひさ [ARAKI, Toyohisa] (Japan) b.1943 |
| Araneda, Nibaldo (Brazil) b.1968 |
| Aranguiz, Waldo (Chile) 1926-2017 |
| Aransay, Carlos Fernández (Spain) b.1964 |
| Arason, Stefán (Iceland) b.1978 |
| Arbeau, Thoinot (仏) 1519-1595? |
| Arbó, Miguel Asíns (スペイン) 1916-1996 |
| Arcadelt, Jacques(Jakob) (ネーデルランド) 1505頃-1568 |
| Arditi, Luigi (伊) 1822-1903 |
| Arensky, Anton (Russia) 1861-1906 |
| * | Argento, Dominick (U.S.A.) 1927-2019 |
| Argov, Alexander Sasha (Russia->Israel) 1914-1995 |
| 有馬礼子 (日本) b.1933 |
| Arkhangelsky, Aleksandr (露) 1846-1924 |
| * | Arlen, Harold (U.S.A.) 1905-1986 |
| * | Arne, Ilze (Latvia) b.1953 |
| Arne, Thomas (U.K.) 1710-1778 |
| * | Arnesen, Kim André (Norway) b.1980 |
| Arriaga, Juan (スペイン) 1806-1826 |
| Arrieu, Claude (France) 1903-1990 |
| Arrigo, Girolamo (伊) b.1930 |
| 旭井翔一 [Shōichi Asai] (Japan) b.1988 |
| 朝川朋之 (日本) b.1960 |
| Ásgeirsson, Jón (アイスランド) b.1928 |
| Asheim, Nils Henrik (ノルウェー) b.1960 |
| * | Ashley, Robert (U.S.A.) 1930-2014 |
| Áskelsson, Hörthur (アイスランド) b.1953 |
| Áskelsson, Jón Hlöthver (アイスランド) b.1945 |
| Åslund, Monica (スウェーデン) ?-? |
| Asola, Giammateo (伊) 1532頃-1609 |
| * | Asriel, Andre (Germany) 1922-2019 |
| Aston, Peter (U.K.) 1938-2013 |
| Astrup, Bendt (デンマーク) b.1932 |
| * | Asu, Jussi (Finland) b.1953 |
| * | Atherton, Michael (オーストラリア) b.1950 |
| * | ATSUSHI (Japan) b.1980 |
| Aubanel, Georges (仏) 1896-1978 |
| Aubert, Louis (France) 1877-1968 |
| Augustinas, Vaclovas (リトアニア) b.1959 |
| * | Auric, Georges (仏) 1899-1983 |
| * | Avni, Tzvi (イスラエル) b.1927 |
| Avshalomov, Jacob (U.S.A.) 1919-2013 |
| Azevedo, Vasco Pearce de (ポルトガル) b.1961 |
| Azevedo, Sérgio (ポルトガル) b.1968 |
| Azeyev, Yevstafy (露) 1851-ca.1918 |
| 東辰三 [AZUMA, Tatsumi] (Japan) 1900-1950 |
| Azurza, David (Spain) b.1968 |
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