| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Siv | SEEV | Swedish, Norwegian, Danish, Norse Mythology | ||
| Siva | - | Tamil, Indian, Telugu, Kannada, Malayalam | ||
| Siward | - | Ancient Germanic | ||
| 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 |