Author
- Annambhatta1
- Anselm of Canterbury1
- Antonia Tanini Pulci1
- Antonio Barbaro1
- Antonio Bernardi1
- Antonio Gazio1
- Antonio Millo1
- Antonio de Villegas1
- Antonio de la Torre1
- António Vieira1
- Arles1
- Armenian Catholic Church1
- Arnaldus de Villa Nova1
- Arnold-André Sittard1
- Arnulf of Bohéries1
- Arşı Baba1
- Asher ben Jehiel1
- Ashkenazi, Malkiel, -approximately 16201
- Ataullah Mehmet Efendi1
- Athanasius of Alexandria1