| Aengus | Exceptionally strong |
| Afric | Derived from the land of Africa. |
| Africa | Named after the vast sunny continent. |
| Ahern | Lord of the horses |
| Aiden | A little fire or fiery one. |
| Aife | A great warrior woman of myth |
| Aigneis | A name meaning pure or holy. |
| Ailidh | A name meaning a noble person. |
| Ailill | Mythical king of Connaught |
| Ailis | A Gaelic form of noble nature. |
| Aina | A source of life and beauty. |
| Aine | A name meaning joy or radiance. |
| Aingeal | A messenger from the heavens. |
| Airell | A name meaning noble leader. |
| Airic | A name meaning eternal ruler. |
| Aislynn | Inspiration. Variant of Aislinn. |
| Aithne | Little fire or passion |
| Alan | Fair: handsome. See also Allen. |
| Alane | A peaceful and harmonious person. |
| Alanna | Precious and beautiful child. |
| Alanson | Son of the noble Alan. |
| Alastrina | Defends mankind |
| Alastrine | Defends mankind |
| Alastriona | Defends mankind |
| Aleen | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Aleena | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Alena | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Alene | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Aline | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Allan | A handsome or cheerful person. |
| Allen | A handsome and harmonious man. |
| Allena | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Allene | Fair: good-looking. Feminine of Allen or variant of Helen. |
| Allyn | A name meaning a handsome person. |
| Alma | All good; Good; Geist spirit; Kind. Loving. The soul. Rarely used before the 1854 Crimean War Battle of Alma, but subsequently very fashionable.; Loving.; Name of river; One who is nurturing and kind / refers to the soul; Spirit & strength; Soul; Soul. Ra |
| Amergin | An ancient name meaning born of song. |
| Anant | Infinite; From the stream |
| Andraste | A goddess of victory and war. |
| Anghus | Exceptionally strong |
| Angus | Exceptionally strong |