| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Sebastian | ze-BAHS-tee-ahn (German), sə-BAS-chən (English), se-BAHS-tyahn (Polish), SE-bahs-tee-ahn (Finnish) | German, English, Swedish, Norwegian, Danish, Polish, Finnish, Romanian | ||
| Sebastianus | - | Late Roman | ||
| Secundinus | - | Ancient Roman | ||
| Secundus | - | Ancient Roman | ||
| Seneca | SEN-ə-kə (English) | Ancient Roman | ||
| Septima | - | Ancient Roman, Spanish | ||
| Septimius | - | Ancient Roman | ||
| Septimus | - | Ancient Roman | ||
| Serafim | - | Russian, Romanian, Macedonian | ||
| Seraphina | - | English (Rare), German (Rare), Late Roman | ||
| Seraphinus | - | Late Roman | ||
| Serena | sə-REEN-ə (English), se-RE-nah (Italian) | English, Italian, Late Roman | ||
| Serghei | - | Romanian | ||
| Sergiu | - | Romanian | ||
| Sergius | - | Ancient Roman |