| SlavomÍR | | - | Czech, Slovak | |
| Slavomir | | - | Croatian, Serbian, Medieval Slavic | |
| Slobodan | | - | Serbian, Macedonian, Croatian | |
| Slobodanka | | - | Serbian, Croatian | |
| SluaghadhÁN | | - | Ancient Irish | |
| Smiljana | | - | Croatian, Serbian | |
| Snezhana | | - | Russian, Bulgarian, Macedonian | |
| SnjeŽAna | | - | Croatian, Serbian | |
| Snorri | | - | Ancient Scandinavian, Icelandic | |
| SoŇA | | - | Czech, Slovak | |
| Sobeslav | | - | Medieval Slavic | |
| Socrates | | SAHK-rə-teez (English) | Ancient Greek (Latinized) | |
| SoffÍA | | - | Icelandic | |
| Sofia | | zo-FEE-ah (German), so-FEE-ah (Italian), soo-FEE-ə (Portuguese), SO-fee-ah (Finnish) | Norwegian, Swedish, German, Italian, Portuguese, Catalan, Greek, Finnish, Estonian, Slovak, Romanian | |
| Sofie | | zo-FEE (German), so-FEE-e (Danish), so-FEE (Dutch) | German, Danish, Dutch, Czech | |