| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Amnchadh | Irish | Brave. | M | |
| 42 | Angus | Irish | From the Gaelic Aonghus,meaning one choice, or one vigor. No longer in common use in Ireland.One vigor. | M | |
| 43 | Anlon | Irish | Champion. | M | |
| 44 | Anluan | Irish | Champion. | M | |
| 45 | Anmcha | Irish | Brave. | M | |
| 46 | Ann | Irish | Priceless. | M | |
| 47 | Annaduff | Irish | From the black marsh. | M | |
| 48 | Anntoin | Irish | Priceless. | M | |
| 49 | Anrai | Irish | Variant of Einri: Rules the home. | M | |
| 50 | Aodh | Irish | Fire; fiery. | M | |
| 51 | Aodha | Irish | Variant of Aodh: Fire; fiery. | M | |
| 52 | Aodhaigh | Irish | Variant of Aodh: Fire; fiery. | M | |
| 53 | Aodhan | Irish | Variant of Aodh: Fire; fiery. | M | |
| 54 | Aodhfin | Irish | Variant of Aodh: Fire; fiery; white fire. | M | |
| 55 | Aodhfionn | Irish | White fire. | M | |
| 56 | Aodhgan | Irish | Variant of Aodh: Fire; fiery; white fire. | M | |
| 57 | Aoidh | Irish | Variant of Aodh: Fire; fiery; white fire. | M | |
| 58 | Aonghus | Irish | One vigor. | M | |
| 59 | Aralt | Irish | Leader. | M | |
| 60 | Ardagh | Irish | From the high field. | M | |