| Renen | To be born or reborn again. |
| Renpet | Ancient Egyptian for the year. |
| Resheph | Ancient god of the plague. |
| Revolver | A firearm with a rotating cylinder. |
| Reyul | A name meaning king or royal ruler. |
| Rhaenyra | A name meaning dragonlike queen. |
| Rhapsody | An epic poem or musical composition. |
| Rhysand | A name meaning enthusiastic spirit. |
| Rhytham | A steady, recurring musical beat. |
| Riddhim | A name meaning great prosperity. |
| Riff | A short, repeated musical phrase. |
| Rift | A crack, split, or break in ground. |
| Riga | A name meaning a ridge or a valley. |
| Rimma | A name of Russian origin meaning pomegranate. |
| Rishya | A Sanskrit name meaning a male deer or antelope. |
| Riyo | A Japanese name meaning village or jasmine child. |
| Rizzo | An Italian surname meaning curly or frizzy hair. |
| Robigus | The Roman god who protected crops from disease. |
| Rohesia | A Germanic name meaning famous kind or gentle. |
| Rosalindith | A rare name meaning beautiful rose of grace. |
| Rosamma | A blend of Rose and Mary meaning bitter rose. |
| Rosmerta | A Celtic goddess of fertility and abundance. |
| Rove | An English word meaning to wander or roam free. |
| Roxette | A bright and shining star. |
| Rubeus | Derived from the color red. |
| Rudraani | The wife of Lord Shiva. |
| Rum | A spirit made from sugar. |
| Rumble | A low, continuous sound. |
| Rumpelstiltskin | A famous fairy tale imp. |
| Runaa | A secret or hidden whisper. |
| Runen | Ancient Germanic symbols. |
| Rung | A step on a wooden ladder. |
| Rushdie | One who is well guided. |
| Russet | A reddishbrown color tone. |
| Ruv | A name meaning friend or companion. |
| Ryota | A name meaning refreshing and big. |
| Ryoto | A name meaning dragon and person. |
| Ryuk | A name meaning dragon and gift. |
| Ryuko | A name meaning dragon child. |
| Ryze | A name meaning to rise or ascend. |