| Savely | | - | Russian | |
| Savva | | - | Russian | |
| Selena | | - | Spanish, Russian, Greek Mythology (Latinized) | |
| Semen | | - | Ukrainian, Russian | |
| Semyon | | sye-MYON, see-MYON | Russian | |
| Serafim | | - | Russian, Romanian, Macedonian | |
| Serafima | | sye-rah-FEE-mah (Russian), see-rah-FEE-mah (Russian), se-rah-FEE-mah (Macedonian) | Russian, Macedonian | |
| Sergei | | syer-GYAY (Russian), seer-GYAY (Russian) | Russian, Bulgarian | |
| Sergej | | syer-GYAY (Russian), seer-GYAY (Russian) | Russian, Bulgarian | |
| Sergey | | syer-GYAY (Russian), seer-GYAY (Russian) | Russian, Bulgarian | |
| Sevastian | | - | Russian | |
| Sevastyan | | - | Russian | |
| Shura | | - | Russian | |
| Slava | | - | Russian, Slovene, Croatian | |
| Snezhana | | - | Russian, Bulgarian, Macedonian | |