| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Synne | - | Norwegian | ||
| Syntyche | SIN-tə-kee (English) | Biblical, Biblical Greek, Ancient Greek | ||
| Syuzanna | - | Russian | ||
| Szabina | SAW-bee-naw | Hungarian | ||
| Szabolcs | - | Hungarian | ||
| Szandra | - | Hungarian | ||
| SzilÁRd | - | Hungarian | ||
| Szilveszter | SEEL-ves-ter | Hungarian | ||
| Szilvia | SEEL-vee-aw | Hungarian | ||
| Szonja | SON-yaw | Hungarian |