| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| SYLVAIN | seel-VEN | French | ||
| SYLVANUS | - | English (Archaic) | ||
| Sylvester | [sil'vestə] | |||
| SYLVESTER | sil-VES-tər (English) | English, Dutch, Danish, German | ||
| SYLVESTRE | - | French | ||
| SYLWESTER | sil-VES-ter | Polish | ||
| SYMEON | - | Biblical Greek, Biblical Latin | ||
| SYMEONU | - | Old Church Slavic | ||
| SYMON | - | Ukrainian (Rare) | ||
| SZABOLCS | - | Hungarian | ||
| SZCZĘSNY | SHCHENS-ni | Polish | ||
| SZCZEPAN | SHCHE-pahn | Polish | ||
| SZILÁRD | - | Hungarian | ||
| SZILVESZTER | SEEL-ves-ter | Hungarian | ||
| SZYMON | SHI-mawn | Polish |