| Stanislava | | stah-nee-SLAH-vah (Russian) | Czech, Slovak, Bulgarian, Serbian, Croatian, Slovene, Russian, Medieval Slavic | |
| Stas | | STAHS | Russian | |
| Stasya | | - | Russian | |
| Stepan | | stye-PAHN (Russian), stee-PAHN (Russian) | Russian, Armenian | |
| Susanna | | soo-ZAHN-nah (Italian), SOO-sahn-nah (Finnish), soo-ZAN-ə (English) | Italian, Swedish, Finnish, Russian, Dutch, English, Biblical, Biblical Latin, Old Church Slavic | |
| Sveta | | - | Russian | |
| Svetlana | | svyet-LAH-nah (Russian), sveet-LAH-nah (Russian) | Russian, Slovak, Bulgarian, Serbian, Macedonian | |
| Svyatopolk | | - | Russian | |
| Svyatoslav | | svyah-tah-SLAHF (Russian) | Russian, Ukrainian | |
| Sylvana | | sil-VAN-ə (English) | Various | |
| Syuzanna | | - | Russian | |