| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1 | Abban | Irish | Abbot. | M | |
| 2 | Abiageal | Irish | Irish form of Abigail. Brings joy. | F | |
| 3 | Abracham | Irish | Irish form of Abraham. | M | |
| 4 | Achaius | Irish | Horseman. | M | |
| 5 | Adamnan | Irish | Little Adam. | M | |
| 6 | Adan | Irish | Little fire. | F | |
| 7 | Adara | Irish | From the ford at the oak tree. | F | |
| 8 | Adare | Irish | From the ford of the oak tree. | M | |
| 9 | Addergoole | Irish | From between two fords. | M | |
| 10 | Adeen | Irish | Little fire. | F | |
| 11 | Aderrig | Irish | From the red ford. | M | |
| 12 | Adhamh | Irish | Of the earth. | M | |
| 13 | Adhamhnan | Irish | Variant of Adamnan: Little Adam. | M | |
| 14 | Aeary | Irish | Scholar. | M | |
| 15 | Aedus | Irish | Fire. | M | |
| 16 | Aeneas | Irish | Praise. | M | |
| 17 | Aengus | Irish | One vigor. | M | |
| 18 | Afric | Irish | Pleasant. | F | |
| 19 | Africa | Irish | Pleasant. | F | |
| 20 | Agata | Irish | Kind. | F | |