| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 321 | Aphrodite | Greek | Goddess of love. | F | |
| 322 | Apollina | Greek | From Apdlo. | F | |
| 323 | Apollinaris | Greek | From Apdlo. | F | |
| 324 | Apollo | Greek | Manly beauty. In Greek mythology, Apollo was the god of medicine and healing who drove his fiery chariot (the sun) through the sky. | M | |
| 325 | Apollon | Greek | Variant of Apollo: Manly beauty. In Greek mythology, Apollo was the god of medicine and healing who drove his fiery chariot (the sun) through the sky. | M | |
| 326 | Apollonia | Greek | Of Apollo. St Apollonia was a 3rd-century martyr who had her own teeth knocked out, frequently invoked against toothache. | F | |
| 327 | Apollos | Greek | Variant of Apollo: Manly beauty. In Greek mythology, Apollo was the god of medicine and healing who drove his fiery chariot (the sun) through the sky. | M | |
| 328 | Apolo | Greek | Variant of Apollo: Manly beauty. In Greek mythology, Apollo was the god of medicine and healing who drove his fiery chariot (the sun) through the sky. | M | |
| 329 | Apoloniusz | Greek | Manly beauty. | M | |
| 330 | Apostolos | Greek | Apostle. | M | |
| 331 | Appolina | Greek | Variant of Apollonia: Of Apollo. St Apollonia was a 3rd-century martyr who had her own teeth knocked out, frequently invoked against toothache. | F | |
| 332 | Appoline | Greek | Variant of Apollonia: Of Apollo. St Apollonia was a 3rd-century martyr who had her own teeth knocked out, frequently invoked against toothache. | F | |
| 333 | Aquilo | Greek | North wind. | M | |
| 334 | Arachne | Greek | Changed into a spider by Athena. | F | |
| 335 | Arcadia | Greek | Pastoral simplicity and happiness. | F | |
| 336 | Arcas | Greek | In Greek mythology, Arcas was the son of Jupiter and Callisto and son of Zeus. | M | |
| 337 | Arcenio | Greek | Virile; masculine. St. Arsenius the Great tutored Roman emperor Theodosius' sons. Actor/television personality Arsenio Hall. | M | |
| 338 | Archelaus | Greek | ruler of the people. Archelaus was one of the sons of King Herod the Great, mentioned in the New Testament. Became popular again in the 19th century. | M | |
| 339 | Archemorus | Greek | Son of Lycurgus. | M | |
| 340 | Archimedes | Greek | To think about first. | M | |