| Gaelic boys baby names begining from A |
| Abboid |
 | Abbey father. |
| Adair |
 | From the oak tree ford. |
| Adhamh |
 | Gaelic form of Adam. |
| Aherin |
 | Owns many horses. |
| Ahern |
 | Owns many horses. |
| Aherne |
 | Owns many horses. |
| 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. |
| Aiden |
 | Fiery. |
| Ailean |
 | Handsome. |
| Ailen |
 | Handsome. |
| Ailin |
 | Handsome. |
| Aindreas |
 | Manly. |
| Airdsgainne |
 | From the height of the cliff. |
| Airleas |
 | Pledge. |
| Al |
 | Diminutive of Alistair: A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. |
| Alai |
 | Defender of man. |
| Alasdair |
 | A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. |
| Alastair |
 | Variant of Alexander defender of mankind. |
| Alaster |
 | Defender of man. |
| Alistair |
 | A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. |
| Alistaire |
 | Variant of Alexander defender of mankind. |
| Alister |
 | Variant of Alexander defender of mankind. |
| Allie |
 | Diminutive of Alistair: A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. |
| Allister |
 | Defender of man. |
| Ally |
 | Diminutive of Alistair: A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. |
| Alroy |
 | Red haired. |
| Angus |
 | Superior strength. |
| Aodh |
 | Spirit. |
| Aodhagan |
 | Ardent. |
| Aodhhan |
 | Ardent. |
| Aonghus |
 | Superior strength. |
| Arlen |
 | Pledge. |
| Arregaithel |
 | From the land of the Gaels. |
| Art |
 | Rock. |
| Artur |
 | Rock. |
| Athdar |
 | From the oak tree ford. |
| Athdara |
 | From the oak tree ford. |
| Gaelic boys baby names begining from B |
| Bacstair |
 | Baker. |
| Bailefour |
 | From the pasture land. |
| Baillidh |
 | Steward. |
| Bain |
 | Lives near the clear stream. |
| Bainbridge |
 | Lives by the bridge over the stream. |
| Bainhrydge |
 | Lives by the bridge over the stream. |
| Baird |
 | Poet. |
| Balfor |
 | Variant of Balfour: From the grazing land. |
| Balfore |
 | Variant of Balfour: From the grazing land. |
| Balfour |
 | From the grazing land. |
| Banain |
 | Little blond one. |
| Banning |
 | Little blond one. |
| Baran |
 | Noble warrior. |
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