| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Seisyll | - | Ancient Celtic | ||
| Seleucus | - | Ancient Greek (Latinized) | ||
| Seleukos | - | Ancient Greek | ||
| Seneca | SEN-ə-kə (English) | Ancient Roman | ||
| Septima | - | Ancient Roman, Spanish | ||
| Septimius | - | Ancient Roman | ||
| Septimus | - | Ancient Roman | ||
| Sergius | - | Ancient Roman | ||
| Servius | SER-wi-uws | Ancient Roman | ||
| Seti | - | Ancient Egyptian | ||
| Severianus | - | Ancient Roman | ||
| Severina | - | Italian, Portuguese, Croatian, German, Ancient Roman | ||
| Severinus | - | Ancient Roman | ||
| Severus | - | Ancient Roman | ||
| Sextilius | - | Ancient Roman |