Author
- William of Conches2
- William of Montlauzun2
- William of Pagula2
- Abbadia San Salvatore1
- Abdias of Babylon1
- Abraham Faber1
- Abu al-Qasim al-Zahrawi1
- Accursius1
- Achilles Statius1
- Adam Luce Dominici1
- Adam of Aldersbach1
- Adam of Bockenfield1
- Adam of Eynsham1
- Adriano Castellesi1
- Aelianus Tacticus1
- Aelius Donatus1
- Agnes de Cavaciis1
- Agnes de Claustris1
- Alain de Lille1
- Albert de Löwenstein-Wertheim-Virnebourg1