| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 141 | Arthgallo | Irish | Valour; high honor. | M | |
| 142 | Arthur | Irish | Derived from the Irish art meaning 'stone'. Arthur was a 6th Century Irish prince. | M | |
| 143 | Artur | Irish | Noble bear. | M | |
| 144 | Ashling | Irish | Vision. | F | |
| 145 | Assan | Irish | Waterfall. | M | |
| 146 | Assana | Irish | Waterfall. | F | |
| 147 | Assane | Irish | Waterfall. | F | |
| 148 | Asthore | Irish | Loved one. | F | |
| 149 | Athdara | Irish | From the ford at the oak tree. | F | |
| 150 | Athracht | Irish | Name of a saint. | F | |
| 151 | Attracta | Irish | Name of a saint. | F | |
| 152 | Augusteen | Irish | Feminine form of Augustine: great. | F | |
| 153 | Auley | Irish | Irish form of Olaf. | M | |
| 154 | Auliffe | Irish | Irish form of Olaf. | M | |
| 155 | Aurnia | Irish | Golden lady. | F | |
| 156 | Avonmora | Irish | From the great river. | F | |
| 157 | Avonmore | Irish | From the great river. | M | |
| 158 | Awnan | Irish | Little Adam. | M | |
| 159 | Baethan | Irish | Foolish. | M | |
| 160 | Baibre | Irish | Strange. | F | |