| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 61 | Aodhan | Celtic | Fire. | M | |
| 62 | Aonghus | Celtic | Exceptionally strong. | M | |
| 63 | Ap Owen | Celtic | Son of Owen. | M | |
| 64 | Aphria | Celtic | Agreeable. | F | |
| 65 | Arawn | Celtic | Mythical king of the Underworld. | M | |
| 66 | Arden | Celtic | Lofty. Eager. | F | |
| 67 | Arden | Celtic | Eager; ardent. | M | |
| 68 | Ardena | Celtic | Lofty. Eager. | F | |
| 69 | Ardene | Celtic | Lofty. Eager. | F | |
| 70 | Ardra | Celtic | Noble. | F | |
| 71 | Arela | Celtic | An oath. | F | |
| 72 | Argyle | Celtic | From the land of the Irish. | M | |
| 73 | Arienh | Celtic | Oath. | F | |
| 74 | Arlan | Celtic | Oath. | M | |
| 75 | Arlana | Celtic | An oath. | F | |
| 76 | Arleen | Celtic | An oath. | F | |
| 77 | Arlen | Celtic | Oath. | M | |
| 78 | Arlene | Celtic | An oath. | F | |
| 79 | Arleta | Celtic | An oath. | F | |
| 80 | Arlette | Celtic | An oath. | F | |