| Rumen | | ROO-men | Bulgarian, Macedonian | |
| Rumena | | - | Bulgarian, Macedonian | |
| Ruzha | | - | Bulgarian, Macedonian | |
| Samoil | | - | Macedonian | |
| Sashka | | - | Macedonian, Bulgarian | |
| Sasho | | - | Macedonian, Bulgarian | |
| Serafim | | - | Russian, Romanian, Macedonian | |
| Serafima | | sye-rah-FEE-mah (Russian), see-rah-FEE-mah (Russian), se-rah-FEE-mah (Macedonian) | Russian, Macedonian | |
| Sime | | - | Macedonian | |
| Simon | | SIE-mən (English), see-MAWN (French), ZEE-mawn (German), SEE-mawn (Dutch) | English, French, Swedish, Norwegian, Danish, German, Dutch, Hungarian, Slovene, Romanian, Macedonian | |
| Simona | | - | Italian, Czech, Slovak, Romanian, Lithuanian, Slovene, Bulgarian, Macedonian | |
| Slavica | | - | Serbian, Croatian, Slovene, Macedonian | |
| Slobodan | | - | Serbian, Macedonian, Croatian | |
| Snezhana | | - | Russian, Bulgarian, Macedonian | |
| Sofija | | - | Serbian, Croatian, Macedonian, Lithuanian, Latvian | |