Author
- Abū al-Qāsim ʻAbd al-Raḥmān ibn ʻAlī ibn Abī Ṣādiq al Nīsābūrī1
- Acyutakr̥ṣṇānandatīrtha1
- Adam Magister1
- Agnivesa1
- Al-Khazini1
- Al-Mawardi1
- Al-Mubashshir ibn Fātik1
- Alberto Cattani1
- Albertus Magnus1
- Albrecht von Eyb1
- Alcuin1
- Aldobrandino da Siena1
- Alessandro Piccolomini1
- Amaracandrasūri1
- Amaru1
- Ambrose1
- Ananta Bhaṭṭa1
- Anantabhaṭṭa1
- Anantakavi1
- Andrea Amadio1