| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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 | ||
| Roderick | RAHD-ə-rik (English), RAHD-rik (English) | English, Scottish, Welsh | ||
| Sawyl | - | Welsh | ||
| Seren | - | Welsh | ||
| Shan | SHAN | Welsh | ||
| SiÂN | SHAH:N | Welsh |