| Welsh baby names begining from A |
| Ab Owen |
 | Son of Owen. |
| Aberfa |
 | From the mouth of the river. |
| Abertha |
| Sacrifice. |
| Aberthol |
| Sacrifice. |
| Adain |
| Winged. |
| Adara |
| Catches birds. |
| Adda |
 | Welsh form of Adam 'of the red earth'. |
| Addfwyn |
| Meek. |
| Addien |
| Beautiful. |
| Addiena |
| Beautiful. |
| Addolgar |
| Devout. |
| Adenydd |
| Winged. |
| Adwr |
| Coward. |
| Adyna |
| Wretched. |
| Aedd |
| A king of Ireland. |
| Aelwyd |
| From the hearth. |
| Alawn |
| Harmony. |
| Albanwr |
| From Scotland. |
| Aled |
| Offspring. |
| Aledwen |
| Feminine form of Aled: Offspring. |
| Alun |
| From the Celtic Alan meaning harmony, stone, or noble. |
| Alwin |
| From Alwyn. |
| Alwyn |
| From Alwyn. |
| Alys |
| A form of the German Alice, meaning nobility. |
| Amathaon |
| Legendary son of Don. |
| Amerawdwr |
| Emperor. |
| Amhar |
| Legendary son of Arthur. |
| Amlawdd |
| Legendary father of Goieuddydd. |
| Amren |
| Legendary son of Bedwyr. |
| Amser |
| Time. |
| Amynedd |
| Patient. |
| Amyneddgar |
| Patient. |
| Anarawd |
| Legendary father of Iddig. |
| Andras |
| Manly; brave. Variant of English Andrew. |
| Andreas |
| Welsh form of Andrew 'manly'. |
| Aneira |
| Feminine form of Aneurin: Uncertain origin, but may be derived from the Latin Honorius meaning man of honour, or from the Welsh eur meaning gold. |
| Aneirin |
| Uncertain origin, but may be derived from the Latin Honorius meaning man of honour, or from the Welsh eur meaning gold. |
| Aneurin |
| Uncertain origin, but may be derived from the Latin Honorius meaning man of honour, or from the Welsh eur meaning gold. |
| Anfri |
| Disgrace. |
| Angawdd |
| Legendary son of Caw. |
| Angharad |
| Much loved. Used in 'Mahinogion,' a collection of medieval Welsh folk tales. The name of famous Welsh actress Angharad Rees. |
| Anghard |
| Loved greatly. |
| Anghrist |
| Antichrist. |
| Angor |
| Anchor. |
| Anwar |
| Wild. |
| Anwas |
| Legendary father of Twrch. |
| Anwell |
| Beloved. |
| Anwen |
| Very beautiful'. |
| Anwil |
| Beloved. |
| Anwill |
| Beloved. |
| |
