- Alman, Samuel (1878-1947)
- Almandoz, Norberto (1893-1970)
- Almås, Per Inge (1947-)
- Almasio, Francesco (1806-1871)
- Almeida Prado, José Antônio Rezende de (1943-)
- Almila, Atso Aksel (1953-)
- Alnæs, Eyvind (1872-1932)
- Alonso Gómez, Miguel (1925-)
- Aloy, Georges (1947-)
- Alphenaar, Gerard (1899-1965)
- Alsop, Graham
- Alsop, John (c1831-1909)
- Alsted, Birgitte (1942-)
- Alston, Joseph Haydn (1878-1951)
- Alstott, Owen (1947-)
- Alt, Carl Gottlieb (1806-1858)
- Alt, Georg Martin (1870-)
- Altavilla, Onofrio (1887-)
- Altenberg, Johann Ernst (1734-1796)
- Alterhaug, Bjørn (1945-)
- Altham, George (1900-)
- Altieri, Paolo (1745-1820)
- Altman, Ludwig (1910-1990)
- Altmann, Ernst Richard (1888-c1942)
- Altnikol, Johann Christoph (1719-1759)
- Alunāns, Nikolajs (1859-1919)
- Alva, Robert (1896-)
- Alvarado, Dioge de (c1580-1643)
- Alvares, Eduardo (1959-)
- Álvarez, Antonio María (1809-1851)
- Álvarez Alonso, Alonso (1867-1903)
- Alvin, Erik (1902-1992)
- Alvorado, Dioge (Diogo) de (c1580-1643)
- Alwes, Dr Chester Lee (1947-)
- Alwood, Richard (c1550-)
- Alwyn, William Crowther (c1845-1924)
- Åm, Magnar (1952-)
- Åm, Nils (1907-1975)
- Amadei, Roberto (1840-1913)
- Amadéo, Gaetano (1824-1893)
- Amalia, Anna (1723-1787)
- Amann, Aloïse (1834-1899)
- Amann, Gerold (1937-)
- Amann, Michael (1964-)
- Amaral, Padre Francisco Borges do
- Amaral-Vieira, José Carlos (1952-)
- Amatucci, Paulo (1868-1935)
- Amberg, Herman (1834-1902)
- Amberg, Johann (1846-1914)
- Ambrose, Charles (1791-1856)
- Ambrose, John
- Ambrose, Paul (1868-1941)
- Ambrosi, Alearco (1931-)
- Ambrosio, W. F. (1865-1935)
- Ambrosius, Hermann (1897-1983)
- Amdahl, Magne (1942-)
- Amedei, Roberto (1840-1913)
- Amellér, André Charles Gabriel (1912-1990)
- Amelsvoort, Jos van (1910-2003)
- Amenabar, Juan (1922-1999)
- Amerbach, Elias Nikolaus (c1530-1597)
- American Guild of Organists
- Amerongen, Alexander van (1920-1985)
- Amerongen, Jan Willem Karel van (1938-)
- Ames, William T. (1901-1987)
- Amiguet, Henri François (1915-2004)
- Amiot, Jean Claude (1939-)
- Amlin, Martin (1953-)
- Ammann, Benno (1904-1986)
- Ammerbach, Elias Nikolaus (c1530-1597)
- Amner, John (1579-1641)
- Åmodt, Thorleif (1909-2003)
- Amory, Anton Herman (1862-1930)
- Amos, Evertt (1937-1982)
- Amos, Sydney Stephen (1910-)
- Amott, John (1798-1865)
- Amott, Rodney Philip Lennox Cooper (1861-1909)
- Amouroux, Charles (1832-1911)
- Amps, William (1824-1910)
- Ampt, Robert (1949-)
- Amy, Gilbert Claude Adolphe (1936-)
- Anable, Arthur (1894-1947)
- Anacker, August Ferdinand (1790-1854)
- Anacker, Wilhelm (1818-)
- Ancelin, Pierre (1934-2001)
- Ancetti, Orazio
- Ancona, Solange (1943-)
- Ancot, Jean (1799-1822)
- Andel, Wout van (1953-)
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- Anderbygd, Urban (1948-)
- Andergassen, Günther (1930-)
- Andersen, Bo (1963-)
- Andersen, Ejvin Bernhard (1914-1968)
- Andersen, F. (1829-1890)
- Andersen, Hans Aksel (1912-1977)
- Andersén, Harold Fridolf (1919-2001)
- Andersen, Kjell Magne (1954-)
- Andersen, Martin Stig (1973-)
- Andersen, Ole Møller (1934-1991)
- Andersen, Poul Gerhard
- Anderson, Albert Thomas (1855-c1939)
- Anderson, Avril (1953-)
- Anderson, Adrian David (1952-)
- Anderson, Barabara Elizabeth (Beth) (1950-)
- Anderson, David Sutton (1956-)
- Anderson, Henry F.
- Anderson, Horace James (1893-)
- Anderson, John William (Bill) (1936-2003)
- Anderson, James Smith (1853-1945)
- Anderson, Jean (1939-)
- Anderson, John
- Anderson, Julia (1933-2003)
- Anderson, Margaret Monteath (1918-)
- Anderson, Murial Margaret Rose (1908-)
- Anderson, Robert Brown (1910-)
- Anderson, Robert Theodore (1934-2009)
- Anderson, Rod (1935-)
- Anderson, Dr Roland
- Anderson, Ross
- Anderson, Thomas Jefferson (1928-)
- Anderson, Thomas Powell (1910-)
- Anderson, W. R. A.
- Anderson, William
- Anderson, William Robert (1891-1979)
- Anderson-Wuensch, Jean (1939-)
- Anderssén, Alfred (1887-1940)
- Anderssen, Fridthjov (1876-1937)
- Anderssén, Karen Matilda (1888-)
- Andersson, Benny (1946-)
- Andersson, B. Tommy (1964-)
- Andersson, Olof (1956-)
- Andersson, Per (1958-)
- Andersson, Reinhold (1894-1960)
- Anderton, Thomas (1836-1903)
- Anding, Johann Michael (1810-1879)
- Andlauer, Auguste (1845-1926)
- Andlauer, Edouard Ignace (1830-1909)
- Andlauer, Louis Marie François (1877-1915)
- André, Carl (1853-1914)
- André, Jean René (1967-)
- André, Johann Anton (1775-1842)
- André, Johann Baptist (1823-1882)
- André, Johann John (1741-1799)
- André, Josef
- André, Peter Friedrich Julius (1808-1880)
- Andreæ, Fater Carolus (Karl) (c1570-1627)
- Andreassen, Mikkel (1966-)
- Andreassen, Preben (1944-)
- Andrée, Elfrida (1841-1929)
- Andreoli, Evangelista (1810-1875)
- Andres, Daniel Peter (1937-)
- Andrès, Edouàrd (1930-2004)
- Andresen, Mogens (1945-)
- Andreu, Francisco (1785-1844)
- Andrew, Enos (1838-1899)
- Andrews, A.
- Andrews, Bennett W. (1906-1994)
- Andrews, Cecil Victor (1897-)
- Andrews, Carroll Thomas (1918-)
- Andrews, Dennis
- Andrews, Ernest Arthur (1868-1935)
- Andrews, Frederick H. (1804-1885)
- Andrews, Frederick William
- Andrews, George (c1878-)
- Andrews, George Frow (1872-)
- Andrews, Dr George Whitfield (1861-1932)
- Andrews, Harold James (1886-)
- Andrews, Harry Smithson (c1873-1951)
- Andrews, Herbert Compigne (c1867-1929)
- Andrews, Herbert Kennedy (1904-1965)
- Andrews, John Thomas (c1874-)
- Andrews, J. Warren (1860-1932)
- Andrews, Michael
- Andrews, Millicent Gertrude (1881-)
- Andrews, Mark (1875-1939)
- Andrews, William (c1846-)
- Andrews & Sons, William
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Organist & composer 
Composer 
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