| Rihard | | - | Slovene | |
| Robert | | RAH-bərt (English), ro-BER (French), RO-bert (German), RO-bərt (Dutch), RAW-bert (Polish), RO-byert (Russian), RO-beert (Russian) | English, French, Swedish, Norwegian, Danish, German, Dutch, Czech, Slovak, Polish, Russian, Slovene, | |
| Rok | | - | Slovene | |
| Roman | | rah-MAHN (Russian), RAW-mahn (Polish) | Russian, Polish, Czech, Slovak, Ukrainian, Slovene, Croatian, German | |
| Romana | | - | Italian, Polish, Slovene, Croatian, Czech, Slovak, Late Roman | |
| Roza (1) | | RO-zah (Russian) | Russian, Slovene, Bulgarian, Macedonian | |
| Rozalija | | - | Lithuanian, Slovene, Croatian, Macedonian | |
| Rudolf | | ROO-dawlf (German), RUW-dawlf (Polish) | German, Dutch, Swedish, Norwegian, Danish, Polish, Czech, Hungarian, Slovene, Croatian, Russian, Arm | |
| SaŠA | | - | Croatian, Serbian, Slovene | |
| SaŠO | | - | Slovene | |
| Sabina | | sah-BEE-nah (Italian, Spanish, Polish) | Italian, Spanish, Portuguese, Romanian, Polish, Czech, Slovene, Russian, Croatian, Ancient Roman | |
| Samo | | - | Slovene, Medieval Slavic | |
| Sandi | | - | Croatian, Slovene | |
| Sebastijan | | - | Slovene, Croatian | |
| Sebastjan | | - | Slovene | |