| Name | Meaning | Gender | Origin |
|---|
| Ruckus | | Unisex | |
| Rudy | From Rudolph - Famous wolf | Male | |
| Rum | Alcohol distilled from sugar. | Unisex | |
| Runt | | Unisex | Hebrew |
| Rupert | middle name: Biggles | Male | |
| Rush | red-haired | Male | English |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Sabine | Of Sabine, Italy | Unisex | French |
| Sachi | bliss-child; wife of Indra | Unisex | |
| Salem | Peace
| Male | Hebrew |
| Sallie | Princess | Unisex | English |
| Sam | to hear | Male | English |
| Sammy | Hebrew, told by God | Male | English |
| Sampson | sun | Male | Hebrew |
| Sassafras | | Male | Hebrew |
| Sausage | Chopped meat stuffed into a prepared casing and cooked. | Unisex | |
| Scotch | Scotch whiskey. | Unisex | |
| Scout | One dispatched from main body to gather information | Male | Word |
| Seamus | supplanter | Male | Irish |
| Sebastian | An august person | Male | Latin |
| Seren | for Serendipidity | Male | Welsh |
| Seymour | From St. Maur
| Male | English |
| Sherwood | Bright forest. | Male | English |
| Shilo | | Unisex | |
| Shlomo | his peace | Male | Hebrew |