| Name | Meaning | Origin |
|---|
| Abboid | Abbey father. | Gaelic Baby Names |
| Adair | From the oak tree ford. | Celtic Baby Names, English Baby Names, Gaelic Baby Names, Scottish Baby Names |
| Adhamh | Of the earth. | Gaelic Baby Names, Hebrew Baby Names, Irish Baby Names, Scottish Baby Names |
| Afkica | pleasant. | Gaelic Baby Names |
| Africa | pleasant. | Celtic Baby Names, Gaelic Baby Names, Irish Baby Names |
| Aherin | Owns many horses. | Gaelic Baby Names |
| Ahern | Owns many horses. | Celtic Baby Names, Gaelic Baby Names, Irish Baby Names |
| Aherne | Owns many horses. | Gaelic Baby Names |
| Aidan | Little fire, ardent. Aidan was popular in Ireland in the 7th century after the famous Irish monk Aidan, and was revived in the early 19th century. | Anglo-Saxon Baby Names, Celtic Baby Names, Gaelic Baby Names, Irish Baby Names, American Baby Names |
| Aiden | Fiery. | Celtic Baby Names, Gaelic Baby Names, Irish Baby Names, American Baby Names |
| Aigneis | Gaelic forms of Agnes. | Celtic Baby Names, Gaelic Baby Names, Greek Baby Names, Irish Baby Names |
| Ailean | Handsome. | English Baby Names, Gaelic Baby Names, Scottish Baby Names |
| Ailen | Handsome. | Gaelic Baby Names |
| Ailie | The Scottish Gaelic form of Alice. | French Baby Names, Gaelic Baby Names, Scottish Baby Names |
| Ailin | Handsome. | English Baby Names, Gaelic Baby Names, Irish Baby Names |
| Ailis | The Scottish Gaelic form of Alice. | Celtic Baby Names, English Baby Names, Gaelic Baby Names, German Baby Names, Irish Baby Names |
| Aimil | | Gaelic Baby Names |
| Aindreas | Manly. | Gaelic Baby Names, Greek Baby Names, Irish Baby Names, Scottish Baby Names |
| Aingealag | Angel. | Gaelic Baby Names |
| Airdsgainne | From the height of the cliff. | Gaelic Baby Names |