| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 21 | Alistaire | Gaelic | Variant of Alexander defender of mankind. | M | |
| 22 | Alister | Gaelic | Variant of Alexander defender of mankind. | M | |
| 23 | Allie | Gaelic | Diminutive of Alistair: A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. | M | |
| 24 | Allister | Gaelic | Defender of man. | M | |
| 25 | Ally | Gaelic | Diminutive of Alistair: A Scottish Gaelic variant of Alexander from the Greek meaning defender of man. | M | |
| 26 | Alroy | Gaelic | Red haired. | M | |
| 27 | Angus | Gaelic | Superior strength. | M | |
| 28 | Aodh | Gaelic | Spirit. | M | |
| 29 | Aodhagan | Gaelic | Ardent. | M | |
| 30 | Aodhhan | Gaelic | Ardent. | M | |
| 31 | Aonghus | Gaelic | Superior strength. | M | |
| 32 | Arlen | Gaelic | Pledge. | M | |
| 33 | Arregaithel | Gaelic | From the land of the Gaels. | M | |
| 34 | Art | Gaelic | Rock. | M | |
| 35 | Artur | Gaelic | Rock. | M | |
| 36 | Athdar | Gaelic | From the oak tree ford. | M | |
| 37 | Athdara | Gaelic | From the oak tree ford. | M | |
| 38 | Bacstair | Gaelic | Baker. | M | |
| 39 | Bailefour | Gaelic | From the pasture land. | M | |
| 40 | Baillidh | Gaelic | Steward. | M | |