| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 401 | Aristophanes | Latin | Name of a poet. | M | |
| 402 | Aristoteles | Latin | Latin form of Aristotle. | M | |
| 403 | Arletta | Latin | Latinized form of the French Arlette. | F | |
| 404 | Arlo | Latin | Strong; manly. | M | |
| 405 | Armenia | Latin | From Armenia. | F | |
| 406 | Armida | Latin | Little armed one. | F | |
| 407 | Armilla | Latin | Bracelet. | F | |
| 408 | Arne | Latin | Mother of Aeolus III Boeotus. | F | |
| 409 | Arriana | Latin | Variant of Greek Mythological Ariadne who aided Theseus to escape from the Cretan labyrinth. | F | |
| 410 | Arrosa | Latin | Rose. | F | |
| 411 | Arrose | Latin | Rose. | F | |
| 412 | Arruns | Latin | Killed Turnus. | M | |
| 413 | Arsenia | Latin | Feminine of Arsenio. | F | |
| 414 | Aruns | Latin | Killed Turnus. | M | |
| 415 | Arva | Latin | From the seashore. | F | |
| 416 | Arval | Latin | From the cultivated land. | M | |
| 417 | Arvalis | Latin | From the cultivated land. | M | |
| 418 | Arvia | Latin | From the seashore. | F | |
| 419 | Ascanius | Latin | Son of Aeneas. | M | |
| 420 | Asclepius | Latin | God of medicine. | M | |