| Ara | | - | Armenian, Armenian Mythology | |
| Arachne | | ə-RAK-nee (English) | Greek Mythology | |
| Aramazd | | - | Armenian Mythology | |
| Aranrhod | | - | Welsh, Welsh Mythology | |
| Arash | | - | Persian, Persian Mythology | |
| Arawn | | - | Welsh Mythology | |
| Ares | | AR-eez (English), ER-eez (English) | Greek Mythology | |
| Arethousa | | - | Greek Mythology | |
| Arethusa | | - | Greek Mythology (Latinized) | |
| Argus | | - | Greek Mythology (Latinized) | |
| Ariadne | | ah-ree-ahd-ne (Ancient Greek), ar-ee-AD-nee (English) | Greek Mythology | |
| Arianrhod | | - | Welsh, Welsh Mythology | |
| Aries | | AR-eez (English), ER-eez (English) | Roman Mythology | |
| Aristaeus | | ar-is-TEE-əs (English) | Greek Mythology (Latinized) | |
| Aristaios | | - | Greek Mythology | |