| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 301 | Pyotr | Russian | A rock. Form of Peter. | M | |
| 302 | Rahil | Russian | Russian form of Rachel: lamb. | F | |
| 303 | Roman | Russian | A Roman. | M | |
| 304 | Romochka | Russian | A Roman. | M | |
| 305 | Rurik | Russian | Noted ruler. | M | |
| 306 | Sabina | Russian | A Sabine. | F | |
| 307 | Sacha | Russian | Russian feminine variant of Alexander: Defender of men. | F | |
| 308 | Sacha | Russian | Defender of man. | M | |
| 309 | Sanya | Russian | Defender of man. | M | |
| 310 | Sasha | Russian | Defender of man. | F | |
| 311 | Sasha | Russian | Defender of man. | M | |
| 312 | Sashenka | Russian | Defender of man. | F | |
| 313 | Semyon | Russian | Russian form of Simon 'God is heard'. | M | |
| 314 | Serge | Russian | An attendant. | M | |
| 315 | Sergei | Russian | Protector; shepherd. | M | |
| 316 | Serguei | Russian | An attendant. | M | |
| 317 | Seriozha | Russian | An attendant. | M | |
| 318 | Seriozhenka | Russian | An attendant. | M | |
| 319 | Shashenka | Russian | Defender of man. | M | |
| 320 | Shura | Russian | Defender of man. | M | |