Author
- Appendix Vergiliana 1
- Apuleius 1
- Aquila Romanus 1
- Aratus Solensis 2
- Archilochus 2
- Archimedes 2
- Aretaeus of Cappadocia 2
- Arethas, Archbishop of Caesarea (Cappadocia), ca. 860-ca. 940 1
- Argumenta Aeneidis et Tetrasticha in cunctis libris Vergilii 4
- Aristarchus, of Samos 1
- Aristippus, 435?-356? B.C. 1
- Ariston, of Chios 1
- Aristotle. 384-322 9
- Arrian 7
- Augustine Saint, Bishop of Hippo 7
- Autolycus 1
- Bede the Venerable, Saint 673-735 1
- Bion of Phlossa near Smyrna 1
- Boethius d. 524 2
- Callidemus 1
