| Name | Meaning | Gender | Origin |
|---|
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smore | | Unisex | |
| Smores | | Unisex | Hebrew |
| Smuckers | | Unisex | |
| Smudge | A blotch or smear | Male | |
| Sneakers | | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Snow | Frozen crystals that fall in soft, white flakes | Female | English |
| Snowball | | Unisex | |
| Snowman | | Unisex | |
| Snowy | Covered with snow | Unisex | |
| Snuffy | | Unisex | |
| Snuggles | To curl up closely, cuddle | Male | |
| Snuggles | To curl up closely, cuddle | Male | |
| Socks | Short stockings finishing above the ankle | Unisex | |
| Socrates | | Male | |
| Solo | | Unisex | |
| Sonia | wisdom | Female | Russian |
| Sonny | A boy or young man. | Male | Nickname |
| Sooki | | Unisex | |
| Sooty | Covered with soot | Unisex | |
| Sophie | Wisdom. Variant of Sophia
| Female | |
| Sox | Short stockings finishing above the ankle | Unisex | |
| Sox | Short stockings finishing above the ankle | Unisex | |