| Proserpine | | - | Roman Mythology | |
| Quirinus | | kwi-RIEN-əs (English), kwi-REEN-əs (English) | Roman Mythology, Late Roman | |
| Remus | | REE-məs (English) | Roman Mythology, Romanian | |
| Rhea | | REE-ə (English) | Greek Mythology (Latinized), Roman Mythology | |
| Romulus | | RAWM-yə-ləs (English) | Roman Mythology | |
| Salacia | | - | Roman Mythology | |
| Saturn | | SA-tərn (English) | Roman Mythology (Anglicized) | |
| Saturnus | | - | Roman Mythology | |
| Silvanus | | sil-VAY-nəs (English) | Roman Mythology, Ancient Roman, Biblical, Biblical Latin | |
| Silvia | | SEEL-vyah (Italian), SEEL-byah (Spanish) | Italian, Spanish, Portuguese, Romanian, Slovak, English, German, Late Roman, Roman Mythology | |
| Silvius | | - | Late Roman, Roman Mythology | |
| Summanus | | - | Roman Mythology | |
| Tatius | | - | Roman Mythology, Ancient Roman | |
| Terminus | | - | Roman Mythology | |
| Ulysses | | yoo-LIS-eez (English) | Roman Mythology, English | |