| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Alroy | Gaelic | Red haired. | M | |
| 42 | Amber | Gaelic | Fierce. | F | |
| 43 | Amhuinn | Gaelic | Lives at the alder tree river. | F | |
| 44 | Anabal | Gaelic | Joy. | F | |
| 45 | Angus | Gaelic | Superior strength. | M | |
| 46 | Annabel | Gaelic | Joy. | F | |
| 47 | Annabella | Gaelic | Joy. | F | |
| 48 | Annabelle | Gaelic | Joy. | F | |
| 49 | Aodh | Gaelic | Spirit. | M | |
| 50 | Aodhagan | Gaelic | Ardent. | M | |
| 51 | Aodhhan | Gaelic | Ardent. | M | |
| 52 | Aonghus | Gaelic | Superior strength. | M | |
| 53 | Apirka | Gaelic | Pleasant. | F | |
| 54 | Arlen | Gaelic | Pledge. | M | |
| 55 | Arregaithel | Gaelic | From the land of the Gaels. | M | |
| 56 | Art | Gaelic | Rock. | M | |
| 57 | Artur | Gaelic | Rock. | M | |
| 58 | Aselma | Gaelic | Fair. | F | |
| 59 | Athdar | Gaelic | From the oak tree ford. | M | |
| 60 | Athdara | Gaelic | From the oak tree ford. | M | |