| Name | Meaning | Gender | Origin |
|---|
| Rambo | | Male | |
| Raven | Dark haired or wise
| Female | Word |
| Rio | River
| Male | Spanish |
| Rocky | rest | Male | English |
| Rolls | | Unisex | Hebrew |
| Roman | citizen of Rome | Male | Latin |
| Rowdy | A rough disorderly person. | Male | American |
| Sable | A carnivorous mammal of Northern Europe with soft, dark fur. | Female | Animal |
| Samson | Bright sun
| Male | Hebrew |
| Samurai | | Unisex | Hebrew |
| Sasha | defending men | Female | Russian |
| Sergeant | to serve | Male | Latin |
| Shade | | Male | |
| Shark | | Unisex | |
| Shilo | | Unisex | |
| Siberia | | Unisex | |
| Sicily | | Female | Hebrew |
| Sky | The expanse of air over the Earth | Female | Nature |
| Sophie | Wisdom. Variant of Sophia
| Female | |
| Spartacus | from the city of Sparta | Male | Latin |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Stallone | | Unisex | Hebrew |
| Stuart | Bailiff
| Male | Scottish |
| Sultan | A ruler of a Moslem country | Male | Swahili |