| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Reece | - | Welsh | ||
| Rees | - | Welsh | ||
| Reese | - | Welsh | ||
| Rheinallt | - | Welsh | ||
| Rhian | - | Welsh | ||
| Rhiannon | hri-AN-ahn (Welsh), ree-AN-ən (English), REE-ən-ən (English) | Welsh, English, Welsh Mythology | ||
| Rhianon | hri-AN-ahn | Welsh | ||
| Rhianu | - | Welsh | ||
| Rhisiart | - | Welsh | ||
| Rhodri | - | Welsh | ||
| Rhonwen | - | Welsh | ||
| Rhosyn | - | Welsh (Rare) | ||
| Rhydderch | HRUDH-erkh | Welsh | ||
| Rhys | HREES (Welsh), REES (English) | Welsh | ||
| Riannon | - | Welsh |