| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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 |