Author
- Adam of Bockenfield1
- Adam of Eynsham1
- Adrian VI1
- Adriano Castellesi1
- Aelianus Tacticus1
- Alain Chartier1
- Alain of Lille1
- Albert Schultens1
- Albert de Löwenstein-Wertheim-Virnebourg1
- Alberto Cattani1
- Albertus de Saxonia1
- Albrecht von Bonstetten1
- Alexander Bonini1
- Alexander V1
- Alexander VI1
- Alfonso de Cartagena1
- Alfred John Dunkin1
- Alfred of Sareshel1
- Alonzo de Santa Cruz1
- Alulphe of Tournai1