| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 381 | Ardra | Latin | Ardent. Eager. Industrious. | F | |
| 382 | Arela | Latin | Golden. | F | |
| 383 | Ares | Latin | Greek god of war. | M | |
| 384 | Arethusa | Latin | Daughter of Poseidon. | F | |
| 385 | Argenta | Latin | Silver. | F | |
| 386 | Argentia | Latin | Silver. | F | |
| 387 | Argentina | Latin | Silver. | F | |
| 388 | Argolis | Latin | From Argos. | F | |
| 389 | Argus | Latin | A monster. | M | |
| 390 | Ariadna | Latin | Daughter of Minos. | F | |
| 391 | Ariadne | Latin | Daughter of Minos: pleases. | F | |
| 392 | Ariana | Latin | Holy. Variant of Greek Mythological Ariadne who aided Theseus to escape from the Cretan labyrinth. | F | |
| 393 | Arianna | Latin | Variant of Greek Mythological Ariadne who aided Theseus to escape from the Cretan labyrinth. | F | |
| 394 | Arianne | Latin | Variant of Greek Mythological Ariadne who aided Theseus to escape from the Cretan labyrinth. | F | |
| 395 | Aricia | Latin | From Aricia. | F | |
| 396 | Aries | Latin | Ram. | M | |
| 397 | Ariobananes | Latin | Name of a king. | M | |
| 398 | Arion | Latin | Name of a Greek poet. | M | |
| 399 | Aristarchus | Latin | Severe critic. | M | |
| 400 | Aristodeme | Latin | Daughter of Priam. | F | |