| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Ap Howell | Welsh | Son of Howell. | M | |
| 42 | Ap Maddock | Welsh | Son of Maddock. | M | |
| 43 | Ap Owen | Welsh | Son of Owen. | M | |
| 44 | Ap Rhys | Welsh | Son of Rhys. | M | |
| 45 | Ap Roderick | Welsh | Son of Roderick. | M | |
| 46 | Ardwyad | Welsh | Protector. | M | |
| 47 | ArgIwydd | Welsh | Lord. | M | |
| 48 | Arian | Welsh | Silver. Derived from Greek Arion, mythological magic horse born to Poseidon and Demeter. | M | |
| 49 | Arthur | Welsh | Bear hero. | M | |
| 50 | Arthwr | Welsh | Bear hero. | M | |
| 51 | Arval | Welsh | Cried over. | M | |
| 52 | Arvel | Welsh | Cried over. | M | |
| 53 | Arvil | Welsh | Cried over. | M | |
| 54 | Arwystli | Welsh | Good advice; good counsel. | M | |
| 55 | Avaon | Welsh | Legendary son of Talyessin. | M | |
| 56 | Awst | Welsh | Great. | M | |
| 57 | Awstin | Welsh | August. | M | |
| 58 | Badan | Welsh | Boar. | M | |
| 59 | Badden | Welsh | Boar. | M | |
| 60 | Baddon | Welsh | From Baddon. | M | |