| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Aderyn | - | Welsh | ||
| Aeron (1) | - | Welsh | ||
| Aeron (2) | - | Welsh Mythology | ||
| Aerona | - | Welsh | ||
| Aeronwen | - | Welsh | ||
| Aeronwy | - | Welsh | ||
| Afanen | a-VAN-en | Welsh (Rare) | ||
| Afon | - | Welsh | ||
| Aled | AH-led | Welsh | ||
| Alis | - | Welsh | ||
| Alun | A-leen, A-lin | Welsh | ||
| Alwyn | - | Welsh | ||
| Andras | - | Welsh | ||
| Andreas | ahn-DRE-ahs (German, Swedish), ahn-DRHAY-ahs (Dutch) | German, Greek, Swedish, Norwegian, Danish, Dutch, Welsh, Ancient Greek, Biblical Latin, Biblical Gre | ||
| Aneirin | - | Welsh |