| Remigius | | - | Late Roman | |
| Remus | | REE-məs (English) | Roman Mythology, Romanian | |
| Renata | | re-NAH-tah (Italian, Spanish, German, Polish) | Italian, Spanish, Portuguese, German, Polish, Czech, Croatian, Slovene, Late Roman | |
| Renatus | | - | Late Roman | |
| Rhea | | REE-ə (English) | Greek Mythology (Latinized), Roman Mythology | |
| Rodica | | ro-DEE-kah | Romanian | |
| Romaeus | | - | Late Roman | |
| Romana | | - | Italian, Polish, Slovene, Croatian, Czech, Slovak, Late Roman | |
| Romanus | | - | Late Roman | |
| Romulus | | RAWM-yə-ləs (English) | Roman Mythology | |
| Rosalia | | ro-zah-LEE-ah (Italian) | Italian, Spanish, Portuguese, Late Roman | |
| Roxana | | rahk-SAN-ə (English), rok-SAHN-ah (Spanish) | English, Spanish, Romanian, Ancient Greek (Latinized) | |
| Rozalia | | - | Polish, Romanian | |
| Rufina | | - | Russian, Spanish, Ancient Roman | |
| Rufinus | | - | Ancient Roman | |