| NAME | ORIGIN | MEANING | B/G |
| Ab-owen | Welsh | Son of Owen. | Boy |
| Aberthol | Welsh | Sacrifice. | Boy |
| Adda | Welsh | Welsh form of Adam 'of the red earth'. | Boy |
| Addolgar | Welsh | Devout. | Boy |
| Adwr | Welsh | Coward. | Boy |
| Aedd | Welsh | A king of Ireland. | Boy |
| Alawn | Welsh | Harmony. | Boy |
| Albanwr | Welsh | From Scotland. | Boy |
| Aled | Welsh | Offspring. | Boy |
| Amathaon | Welsh | Legendary son of Don. | Boy |
| Amerawdwr | Welsh | Emperor. | Boy |
| Amhar | Welsh | Legendary son of Arthur. | Boy |
| Amlawdd | Welsh | Legendary father of Goieuddydd. | Boy |
| Amren | Welsh | Legendary son of Bedwyr. | Boy |
| Amynedd | Welsh | Patient. | Boy |
| Amyneddgar | Welsh | Patient. | Boy |
| Anarawd | Welsh | Legendary father of Iddig. | Boy |
| Aneirin | Welsh | Uncertain origin, but may be derived from the Latin Honorius meaning man of honour, or from the Welsh eur meaning gold. | Boy |
| Aneurin | Welsh | Uncertain origin, but may be derived from the Latin Honorius meaning man of honour, or from the Welsh eur meaning gold. | Boy |
| Anfri | Welsh | Disgrace. | Boy |
| Angawdd | Welsh | Legendary son of Caw. | Boy |
| Anghrist | Welsh | Antichrist. | Boy |
| Angor | Welsh | Anchor. | Boy |
| Anwas | Welsh | Legendary father of Twrch. | Boy |
| Anwil | Welsh | Beloved. | Boy |
| Anwill | Welsh | Beloved. | Boy |
| Anwir | Welsh | Liar. | Boy |
| Anwyll | Welsh | Beloved. | Boy |
| Anynnawg | Welsh | Legendary son of Menw. | Boy |
| Ap-evan | Welsh | Son of Evan. | Boy |
