- Ariani, Fernando (1959-)
- Arighi, Giacomo (1704-1797)
- Arigoni, Giovanni Giacomo
- Arima, Reiko (1933-)
- Arín, Valentin (1854-1912)
- Arizaga, Rodolfo (1926-1985)
- Arkell, Leonard William Tracy (1892-)
- Arkless, Alfred Thomas (1862-)
- Arlom, Wilfred (1887-1945)
- Armándoz, Norberto (1893-)
- Armbrust, Georg Heinrich Friedrich August (1818-1869)
- Armbrust, Karl Friederich (1849-1896)
- Armbrust, Walter (1882-1941)
- Armbruster, René (1931-1991)
- Armes, Dr Philip (1836-1908)
- Armfelt, Carl (1956-)
- Armingaud, Jules (1820-1900)
- Armistead, James (1877-)
- Armitage, Reginald Moxon (Noel) (1898-)
- Armsby, Hilda Janette (1902-)
- Armsdorff, Andreas (1670-1699)
- Armstrong, Amos Ebenezer (c1868-)
- Armstrong, Elizabeth Audrey (1902-)
- Armstrong, F. Alford
- Armstrong, Dr George Alfred (1897-)
- Armstrong, Jared George
- Armstrong, Sidney Roland (1912-)
- Armstrong, Thomas
- Armstrong, Sir Thomas Henry Wait (1898-1994)
- Armstrong, William Dawson (1868-1936)
- Arnaldi, Antonio (1900-1984)
- Arnatt, Ronald Kent (1930-)
- Arnaud, Jules (1847-1890)
- Arndt, Franz (1875-)
- Arne, Ilze (1953-)
- Arne, Dr Thomas Augustine (1710-1778)
- Arnell, Richard Anthony Sayer (1917-)
- Arneson, David Byron (1929-)
- Arnič, Blaž (1901-1970)
- Arno, Ruth Barrett
- Arnold, Arthur Light (1872-c1929)
- Arnold, Augustine Bernard (1877-)
- Arnold, Corliss Richard (1926-2003)
- Arnold, Frederick James (1908-)
- Arnold, Georg
- Arnold, Dr George Benjamin (1832-1902)
- Arnold, H. F.
- Arnold, Jospeh Andrew (1875-)
- Arnold, Joseph Stanley (1886-)
- Arnold, Karl (1794-1873)
- Arnold, Sir Malcolm Henry (1921-2006)
- Arnold, Dr Samuel (1740-1802)
- Arnoldi, Daniele (1890-1973)
- Arnoš, Parsch (1936-)
- Arnoud, Jules (1847-1890)
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- Arnoux, Georges (1891-1972)
- Arnull, George William (-1852)
- Arokhaty, Béla (1890-)
- Arosio, Arturo
- Aroutjunova, Milena (1969-)
- Arp, Klaus M. (1950-)
- Arrachart, Jean Marc (1945-)
- Arresti, Floriano (1667-1719)
- Arresti, Giulio Cesare (1619-1701)
- Arrigo, Giuseppe (1838-1916)
- Arrigoni, Giovanni Giacomo
- Arriola Jauregui, Juan Ambrosio de (1833-1863)
- Arro, Edgar Alexandrovitch (1911-1978)
- Arrowsmith, James William P. (1871-)
- Arschott, Frédéric (1847-1938)
- Arseneault, Raynald (1945-1995)
- Årsnes, Arvid (1920-)
- Arteaga, Angel (1928-1984)
- Artigarum, Abbé Joseph
- Artigues, Dr Achille L. (1878-)
- Artmüller, K.
- Arts, Antoine (Antonius) (1866-)
- Artyomov, Vyacheslav Petrovich (1940-)
- Aru, Virgilio (1891-1950)
- Arvedi, Paolo (1924-)
- Ås, Else Berntsen (1922-)
- Asboe, Keith (1929-)
- Ascenso, Antonio (1850-c1920)
- Ascham, Roger (1864-1934)
- Ascher, Angelo Andrew (1860-)
- Ascough, Richard (1951-)
- Ashbridge, David (1963-)
- Ashdown, Franklin Donald (1942-)
- Asheim, Nils Henrik (1960-)
- Ashfield, Dr Robert James (1911-2006)
- Ashford, Emma Louise (1850-1930)
- Ashford, Wayne D. (c1949-2004)
- Ashforth, Alden Banning (1933-)
- Ashley, Derick (1901-)
- Ashley, Franklyn
- Ashley, John James (1772-1815)
- Ashley, Robert (1930-)
- Ashley, Violet (1891-)
- Ashlin, William Crompton (c1819-1906)
- Ashmall, William Edwin (1859-1927)
- Ashmore, Bert Andrew E. (1899-)
- Ashmore, Henry Oliver (1862-)
- Ashqar, Père Paul
- Ashton, Algernon Bennet Langton (1859-1937)
- Ashton, Dr Archie Thomas Lee (1873-)
- Ashton, Joseph Nickerson (1868-)
- Ashton, Leopold
- Ashwell, John
- Ashwell, Thomas (c1478-1513)
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Organist 
Organist & composer 
Composer 
Organ builder 
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