| Agaue | | - | Greek Mythology | |
| Aglaea | | - | Greek Mythology (Latinized) | |
| Aglaia | | ə-GLAY-ə (English), ə-GLIE-ə (English) | Greek Mythology, Greek | |
| Agrona | | - | Celtic Mythology | |
| Ahriman | | AH-ri-mahn | Persian Mythology | |
| Ahti | | AHH-tee (Finnish) | Finnish, Finnish Mythology | |
| Ahura Mazda | | ə-HUWR-ə MAZ-də (English) | Persian Mythology | |
| Aias | | ie-ahs (Ancient Greek) | Greek Mythology | |
| Aigle | | - | Greek Mythology | |
| Ailill | | AL-yil | Irish, Irish Mythology | |
| Aineias | | - | Greek Mythology | |
| Aino | | IE-no (Finnish) | Finnish, Finnish Mythology | |
| Aiolos | | - | Greek Mythology | |
| Ajax | | AY-jaks (English) | Greek Mythology (Latinized) | |
| Akantha | | - | Greek Mythology | |