Author
- Apadeva6
- Apostolic Camera1
- Appayya Dikshita8
- Archduke Ernest of Austria1
- Aristotle36
- Arjāsp Umīdī al-Ṭihrānī1
- Arles1
- Armenian Catholic Church3
- Arnaldus de Villa Nova5
- Arnaud, Claude, active 1660-1661.1
- Arnold Goerinus1
- Arnold-André Sittard1
- Arnulf of Bohéries1
- Arnulf of Lisieux1
- Arnulf of Orléans1
- Arrigucci family1
- Arīnī, Muḥammad ibn Najm1
- Arşı Baba1
- Asad Allāh ibn Ismāʻīl Kāẓimī1
- Asad Allāh ibn ʻAbd al-Ghaffār Nādir Māzandarānī1