Encyclopedias, Almanacs, Transcripts, and Maps
- Arons, Leo
- Aronson, Arnold
- Aronson, Boris
- Aronson, David
- Aronson, David
- Aronson, Grigori
- Aronson, Naum
- Aronson, Solomon
- Arpa, Abramo Dall'
- Arpad
- Arraby Moor
- Arragel (Al-Ragil), Moses
- Arras, Councils of
- Arras, Martyrs of, Bb.
- Arregui, Antonio María
- Arriaga, Pablo José de
- Arriaga, Rodrigo de
- Arrian°
- Arricivita, Juan Domingo
- Arrieta, Franciso Sales de