Author
- Pseudo-Phalaris2
- Pseudo-Seneca2
- Ranulf Higden2
- Regiomontanus2
- Remigius of Auxerre2
- Thomas of Capua2
- Walter of Châtillon2
- William Brito2
- William of Conches2
- William of Malmesbury2
- William of Pagula2
- Ælfric of Eynsham2
- Abbadia San Salvatore1
- Abdias of Babylon1
- Abraham Faber1
- Abu al-Qasim al-Zahrawi1
- Accursius1
- Achilles Statius1
- Adam Luce Dominici1
- Adam Magister1