| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Si-Woo | shee-oo | Korean | ||
| Sixtus | - | Late Roman | ||
| Sizwe | - | Southern African, Xhosa | ||
| Sjoerd | SHOORT (Dutch) | Frisian, Dutch | ||
| Sjurd | - | Norwegian | ||
| Skender | - | Albanian | ||
| SlaĐAna | SLAH-jah-nah | Serbian, Croatian | ||
| Sladjana | SLAH-jah-nah | Serbian | ||
| Slamet | SLAH-met | Indonesian, Javanese | ||
| Slava | - | Russian, Slovene, Croatian | ||
| Slaven | - | Croatian, Serbian | ||
| Slavica | - | Serbian, Croatian, Slovene, Macedonian | ||
| Slavka | - | Slovene, Croatian | ||
| Slavko | - | Croatian, Serbian, Slovene | ||
| Slavomir | - | Croatian, Serbian, Medieval Slavic |