Author
- Alberto Cattani1
- Aldobrandino da Siena1
- Alexander of Villedieu1
- Amaracandrasūri1
- Ambrose1
- Anandabodha Paramahansa1
- Ananta Bhaṭṭa1
- Andreas Vesalius1
- Andreas de Escobar1
- Angelo Gambiglioni1
- Aniruddha1
- Anselm of Canterbury1
- Antoninus of Florence1
- Antonio Guaineri1
- Antonius de Vecelli1
- Antonius of Vercelli1
- Aṅgiras1
- Baba1
- Bamroerat, Phra1
- Bartholomaeus de Montagna1