Author
- Ali Qushji1
- Ali al-Qari1
- Ali ibn Abd-al-Malik al-Hindi1
- Ali ibn Maymun1
- Ali Çelebi1
- Alonso Bello1
- Alonso Martin del Canto1
- Alonzo Pimentel, Conde de Benavente1
- Alphonsus Pantius1
- Alsaafīry1
- Alvar Goncalez el Moxo1
- Alṭaaāʼī1
- Ambrosians1
- Amīr Shāhī Sabzavārī1
- Andrea Cambini1
- Andreas Raumburger1
- Andreas Vesalius1
- Andreas de Escobar1
- Andrew Norton of Bristow1
- André Blondel de Rocquencourt1