| SaŠA | | - | Croatian, Serbian, Slovene | |
| Sanja | | - | Croatian, Serbian | |
| Sava | | - | Serbian, Bulgarian | |
| Senka | | - | Serbian, Croatian | |
| Simeon | | SIM-ee-ən (English) | Biblical, Bulgarian, Serbian | |
| Simo | | SEE-mo (Finnish) | Finnish, Serbian | |
| SiniŠA | | - | Croatian, Serbian | |
| SlaĐAna | | SLAH-jah-nah | Serbian, Croatian | |
| Sladjana | | SLAH-jah-nah | Serbian | |
| Slaven | | - | Croatian, Serbian | |
| Slavica | | - | Serbian, Croatian, Slovene, Macedonian | |
| Slavko | | - | Croatian, Serbian, Slovene | |
| Slavomir | | - | Croatian, Serbian, Medieval Slavic | |
| Slobodan | | - | Serbian, Macedonian, Croatian | |
| Slobodanka | | - | Serbian, Croatian | |