| Name | Meaning | Gender | Origin |
|---|
| Snicker-Doodle | | Unisex | Hebrew |
| Snickers | A brand of candy bar. | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Snitch | | Unisex | Hebrew |
| Snuggles | To curl up closely, cuddle | Male | |
| Snuggles | To curl up closely, cuddle | Male | |
| Socks | Short stockings finishing above the ankle | Unisex | |
| Soda | A carbonated water. | Unisex | |
| Solo | | Unisex | |
| Sonic | Approaching the speed of sound, fast-paced | Unisex | |
| Soy | | Unisex | |
| Space | | Unisex | |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spice | Plant used to flavour food or beverages. | Unisex | |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Spook | | Unisex | |
| Spooky | | Unisex | |
| Spyder | | Unisex | |
| Squeaky | | Unisex | |
| Stanley | Lives by the stony grove
| Male | English |
| Sterling | British money or coin. A type of silver. Of good character. genuine, valued | Male | English |
| Strider | | Unisex | Hebrew |
| Strike | | Unisex | Hebrew |
| Sultan | A ruler of a Moslem country | Male | Swahili |
| Sunny | Abounding in sunshine, cheerful | Male | Nickname |