| Name | Meaning | Gender | Origin |
|---|
| Rat | | Unisex | |
| Red | A primary colour resembling the colour of blood | Male | Color |
| Reggie | counsel power | Male | English |
| Reginald | powerful one | Male | English |
| Rick | aka Richard, Dick and Little Man | Male | English |
| Rickey | Powerful, Brave Ruler | Unisex | English |
| Ricky | dominant or peaceful ruler | Male | English |
| Robbie | Abbreviation of Robert Famed: bright: shining.
| Male | |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Robin | Famed: bright: shining Form of Robert popular since the medieval days of Robin Hood. Robinson: (English) Son of Robert Famed: bright: shining. Surname.
| Male | |
| Rock | Italian from German, rest | Male | English |
| Ron | Ronald | Unisex | |
| Rose | Flower
| Female | Latin |
| Rosie | From Rose - The most beautiful of flowers | Female | English |
| Ruth | compassionate friend | Female | Hebrew |
| Sam | to hear | Male | English |
| Sammy | Hebrew, told by God | Male | English |
| Sandy | Abbreviation of Alexander defender of man.
| Male | Scottish |
| Satchel | Sack, Bag | Male | English |
| Scooter | One who goes suddenly and speedily. | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Sparky | Animated, lively. | Unisex | |
| Splinter | | Unisex | Hebrew |