| Steffen | | SHTE-fen (Low German) | Low German, Danish, Norwegian, Dutch | |
| Stein | | - | Norwegian | |
| Steinar | | - | Norwegian | |
| Sten | | - | Swedish, Danish, Norwegian, Dutch | |
| Stian | | - | Norwegian | |
| Stig | | - | Swedish, Norwegian, Danish | |
| Stina | | - | Swedish, Norwegian, Danish | |
| Stine | | - | Danish, Norwegian | |
| Storm | | STORM (English) | English (Modern), Danish, Norwegian | |
| Sunniva | | - | Norwegian | |
| Susann | | zoo-ZAHN (German) | German, Swedish, Norwegian, Danish | |
| Susanne | | zoo-ZAH-nə (German), soo-SAN-ne (Danish) | German, Danish, Swedish, Norwegian | |
| Svanhild | | - | Norwegian, Norse Mythology | |
| Svante | | - | Swedish, Norwegian, Danish | |
| Svein | | - | Norwegian | |