| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 61 | Ardal | Irish | Valour; high honor. | M | |
| 62 | Ardghal | Irish | Variant of Ardal: Valour; high honor. | M | |
| 63 | Ardkill | Irish | From the high church. | M | |
| 64 | ArIyn | Irish | Pledge. | M | |
| 65 | Arlan | Irish | Variant of Arlen: Gaelic word meaning 'pledge; promise; oath'. | M | |
| 66 | Arlen | Irish | Gaelic word meaning 'pledge; promise; oath'. | M | |
| 67 | Arlin | Irish | Variant of Arlen: Gaelic word meaning 'pledge; promise; oath'. | M | |
| 68 | Arlyn | Irish | Variant of Arlen: Gaelic word meaning 'pledge; promise; oath'. | M | |
| 69 | Art | Irish | Noble bear. | M | |
| 70 | Artegal | Irish | Valour; high honor. | M | |
| 71 | Arthgallo | Irish | Valour; high honor. | M | |
| 72 | Arthur | Irish | Derived from the Irish art meaning 'stone'. Arthur was a 6th Century Irish prince. | M | |
| 73 | Artur | Irish | Noble bear. | M | |
| 74 | Assan | Irish | Waterfall. | M | |
| 75 | Auley | Irish | Irish form of Olaf. | M | |
| 76 | Auliffe | Irish | Irish form of Olaf. | M | |
| 77 | Avonmore | Irish | From the great river. | M | |
| 78 | Awnan | Irish | Little Adam. | M | |
| 79 | Baethan | Irish | Foolish. | M | |
| 80 | Bailintin | Irish | Valiant. | M | |