| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 361 | Arien | Greek | A Greek poet and musician. The mythological magic horse born to Poseidon and Demeter. | M | |
| 362 | Aries | Greek | The ram. | M | |
| 363 | Arietta | Greek | Variant of mythological Ariadne who aided Theseus to escape from the Cretan labyrinth. | F | |
| 364 | Arion | Greek | .A Greek poet and musician. The mythological magic talking horse born to Poseidon and Demeter. | M | |
| 365 | Aristaeus | Greek | Noble; son of Apollo. | M | |
| 366 | Aristid | Greek | Son of a great man. | M | |
| 367 | Aristides | Greek | The best. | M | |
| 368 | Aristokles | Greek | The most famous. | M | |
| 369 | Aristotle | Greek | Superior; best of thinkers. Famous Bearers: ancient Greek philosopher Aristotle, and Greek shipping tycoon Aristotle Onassis. | M | |
| 370 | Arkhippos | Greek | Ruler of horses. | M | |
| 371 | Arlane | Greek | Variant of Ariadne: Chaste, very holy. Ariadne was Greek mythological daughter of King Minos of Crete who aided Theseus to escape from the Cretan labyrinth after killing the Minotaur. | F | |
| 372 | Arri | Greek | Diminutive of Aristotle: Superior; best of thinkers. Famous Bearers: ancient Greek philosopher Aristotle, and Greek shipping tycoon Aristotle Onassis. | M | |
| 373 | Arsene | Greek | Strong. | M | |
| 374 | Arsenio | Greek | Manly; strong; virile. Famous Bearer: talk-show host Arsenio Hall. | M | |
| 375 | Artemas | Greek | Variant of Artemus: Follower/gift of Artemis (Greek goddess of the hunt and counterpart of the Roman Diana). | M | |
| 376 | Artemesio | Greek | Gift from Artemis. | M | |
| 377 | Artemia | Greek | Gift from Artemis. | F | |
| 378 | Artemis | Greek | Virgin goddess of the moon; huntress; goddess of the hunt. Mythology; the equivalent of the Roman Diana. | F | |
| 379 | Artemisia | Greek | Gift from Artemis. Of Artemis, the Greek counterpart of the Roman goddess Diana. 4th Century Queen of Caria, Artemisia, was responsible for the Mausoleum of Halicarnassus, one of the Seven Wonders of the World. | F | |
| 380 | Artemus | Greek | Follower/gift of Artemis (Greek goddess of the hunt and counterpart of the Roman Diana). Famous bearer: 19th century American humorist Charles Farrar Browne used the pseudonym Artemus Ward. | M | |