| Roman | | rah-MAHN (Russian), RAW-mahn (Polish) | Russian, Polish, Czech, Slovak, Ukrainian, Slovene, Croatian, German | |
| Rostislav | | rahs-tee-SLAHF (Russian) | Russian, Czech, Medieval Slavic | |
| Roza (1) | | RO-zah (Russian) | Russian, Slovene, Bulgarian, Macedonian | |
| Rozaliya | | - | Russian | |
| Rudolf | | ROO-dawlf (German), RUW-dawlf (Polish) | German, Dutch, Swedish, Norwegian, Danish, Polish, Czech, Hungarian, Slovene, Croatian, Russian, Arm | |
| Ruf | | - | Russian | |
| Rufina | | - | Russian, Spanish, Ancient Roman | |
| Rurik | | - | Russian | |
| Ruslan | | roo-SLAHN (Russian) | Russian, Tatar, Bashkir, Ukrainian, Belarusian, Kazakh, Kyrgyz, Uzbek, Azerbaijani, Ossetian, Cheche | |
| Sabina | | sah-BEE-nah (Italian, Spanish, Polish) | Italian, Spanish, Portuguese, Romanian, Polish, Czech, Slovene, Russian, Croatian, Ancient Roman | |
| Samuil | | sah-moo-EEL (Russian) | Russian, Bulgarian | |
| Sanya (2) | | - | Russian | |
| Sasha | | - | Russian, Ukrainian, English, French | |
| Saveli | | - | Russian | |
| Saveliy | | - | Russian | |