Author
- Adam of Aldersbach1
- Adam of Bockenfield1
- Adam of Eynsham1
- Adrian VI2
- Adriano Castellesi1
- Adrien de le Borve1
- Aelianus Tacticus1
- Aelius Donatus1
- Afz̤al al-Dīn Shirvānī Khāqānī1
- Agnes de Cavaciis1
- Agnes de Claustris1
- Agnivesa1
- Agniveśamuni1
- Agostino Staccoli1
- Ahmad al-Buni1
- Ahmad ibn Abd al-Razzaq al-Tantarani1
- Ahmed al-Tijani1
- Ahmed ibn Nasir1
- Al-Biruni1
- Al-Damiri1