| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| RÍGhnach | - | Irish Mythology | ||
| RÍOghnach | - | Irish Mythology | ||
| Ra | RAH | Egyptian Mythology | ||
| Raiden | - | Far Eastern Mythology | ||
| Raijin | ṙah-ee-jeen (Japanese) | Far Eastern Mythology | ||
| Rangi | - | Maori, Polynesian Mythology | ||
| Rashn | - | Persian Mythology | ||
| Rashnu | - | Persian Mythology | ||
| Re | RAY | Egyptian Mythology | ||
| Remus | REE-məs (English) | Roman Mythology, Romanian | ||
| Rhea | REE-ə (English) | Greek Mythology (Latinized), Roman Mythology | ||
| Rheia | - | Greek Mythology | ||
| Rhiannon | hri-AN-ahn (Welsh), ree-AN-ən (English), REE-ən-ən (English) | Welsh, English, Welsh Mythology | ||
| Rigantona | - | Celtic Mythology | ||
| Romulus | RAWM-yə-ləs (English) | Roman Mythology |