| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 21 | Agate | Irish | Kind. | F | |
| 22 | Aghaderg | Irish | From the red ford. | M | |
| 23 | Aghadreena | Irish | From the field of the sloe bushes. | F | |
| 24 | Aghamora | Irish | From the great field. | F | |
| 25 | Aghamore | Irish | From the great field. | M | |
| 26 | Aghaveagh | Irish | From the field of the old tree. | F | |
| 27 | Aghavilla | Irish | From the field of the old tree. | F | |
| 28 | Aghna | Irish | Irish form of Agnes. | F | |
| 29 | Aghy | Irish | Friend of horses. | M | |
| 30 | Aguistin | Irish | Majestic. | M | |
| 31 | Ahana | Irish | From the little ford. | F | |
| 32 | Ahane | Irish | From the little ford. | M | |
| 33 | Ahearn | Irish | Lord of the horses. | M | |
| 34 | Ahern | Irish | Lord of the horses. | M | |
| 35 | Aidan | Irish | Little fire. | F | |
| 36 | Aidan | Irish | Warm; little fire. A masculine variant of Eshne from Irish Gaelic. Famous Bearer: actor Aidan Quinn. | M | |
| 37 | Aideen | Irish | Little fire. | F | |
| 38 | Aiden | Irish | Fiery. | M | |
| 39 | Aidrian | Irish | From the Adriatic. | M | |
| 40 | Aifric | Irish | Pleasant. | F | |