| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Owena | - | Welsh | ||
| Paderau | - | Welsh | ||
| Padrig | - | Welsh, Breton | ||
| Parry | - | Welsh | ||
| Pedr | - | Welsh | ||
| Peredur | pe-RE-deer (Welsh Mythology) | Welsh Mythology, Arthurian Romance | ||
| Price | PRIES | Welsh | ||
| Pryce | PRIES | Welsh | ||
| Pryderi | - | Welsh, Welsh Mythology | ||
| Pwyll | - | Welsh Mythology | ||
| Reece | - | Welsh | ||
| Rees | - | Welsh | ||
| Reese | - | Welsh | ||
| Rheinallt | - | Welsh | ||
| Rhian | - | Welsh |