| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Aiolos | Greek | Change. | M | |
| 42 | Ajax | Greek | Eagle. Also a figure in ancient Greek mythology. | M | |
| 43 | Akil | Greek | From the river Akil. | M | |
| 44 | Alandair | Greek | Variant of Alexander: Defender of men. Alexander the Great was a 4th century Macedonian king for whom the Egyptian city of Alexandria is named. Eight popes and three Russian emperors have been named Alexander. | M | |
| 45 | Alasd | Greek | Avenger. | M | |
| 46 | Alasdair | Greek | Variant of Alexander: Defender; protector of mankind. Famous Bearer: Alexander the Great. | M | |
| 47 | Alastair | Greek | Variant of Alexander: Defender; protector of mankind. Famous Bearer: Alexander the Great. | M | |
| 48 | Alaster | Greek | Variant of Alexander: Defender; protector of mankind. Famous Bearer: Alexander the Great. | M | |
| 49 | Alastor | Greek | Avenger. | M | |
| 50 | Alcinoos | Greek | Helps Odysseus return home. | M | |
| 51 | Alcinous | Greek | Helps Odysseus return home. | M | |
| 52 | Alcnaeon | Greek | One of the Thebes attackers. | M | |
| 53 | Alcyoneus | Greek | Kingfisher. Alcyoneus fought against Athena in Greek mythology. | M | |
| 54 | Alddes | Greek | Descended from Alcaeus. | M | |
| 55 | Alec | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 56 | Alejandro | Greek | Variant of Alexander: Defender; protector of mankind. Famous Bearer: Alexander the Great. | M | |
| 57 | Alejo | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 58 | Alek | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 59 | Aleko | Greek | Variant of Alexander 'defender of mankind.'. | M | |
| 60 | Alekos | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |