Encyclopedias, Almanacs, Transcripts, and Maps
- Aguirre Cerda, Pedro (1879–1941)
- Aguirre y Salinas, Osmín (1889–1977)
- Aguirre, Atanasio (1801–1875)
- Aguirre, Juan Francisco de (1758–1811)
- Aguirre, Julián (1868–1924)
- Aguirre, Lope de (1518–1561)
- Aguirre, Nataniel (1843–1888)
- Agustín, José (1944–)
- Agustini, Delmira (1886–1914)
- Ahali Group
- Ahd, al-
- Ahdut ha-Avodah
- Ahir
- Ahirs
- Ahl-e Haqq
- Ahram Center for Political and Strategic Studies, al-
- Ahtna
- Ahuizote, El
- Aiken, George David
- Aikman, Troy Kenneth