| Name | Meaning | Gender | Origin |
|---|
| Ringo | apple, peace be with you | Male | English |
| River | | Male | |
| Rocky | rest | Male | English |
| Roman | citizen of Rome | Male | Latin |
| Rowen | Welsh for slender and wize | Unisex | |
| Rox | | Unisex | Hebrew |
| Saber | | Unisex | |
| Sargent | officer, to serve | Male | Spelling |
| Sausage | Chopped meat stuffed into a prepared casing and cooked. | Unisex | |
| Scout | One dispatched from main body to gather information | Male | Word |
| Scraps | | Male | |
| Shane | God is gracious | Male | Irish |
| Sherbet | | Unisex | Hebrew |
| Skittles | | Male | |
| Skittles | | 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 | |
| Snickers | A brand of candy bar. | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Snoopy | | Male | |
| Sonny | A boy or young man. | Male | Nickname |
| Speckles | | Unisex | Hebrew |
| Spice | Plant used to flavour food or beverages. | Unisex | |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |