Author
- Antonia Tanini Pulci1
- Antonino Castaldo1
- Antonius Ferro1
- Antonius of Vercelli1
- Arles1
- Armenian Catholic Church1
- Arnulf of Bohéries1
- Arnulf of Orléans1
- Asher ben Jehiel1
- Athanasius of Alexandria1
- Augustinians1
- Augustinus de Leonissa1
- Averroes1
- Avraham ben Mosheh Heilpronn1
- Avraham ben Tamim1
- Awn ad-Din ibn Hubayra1
- Azad Bilgrami1
- Azar Bigdeli1
- Aḥmad Dīkqūz1
- Aḥmad Ibn-Yaḥyā Ibn-Abī-Ḥaǧala1