| Name | Meaning | Gender | Origin |
|---|
| Snoopy | | Male | |
| Snow | Frozen crystals that fall in soft, white flakes | Female | English |
| Sophie | Wisdom. Variant of Sophia
| Female | |
| Sparky | Animated, lively. | Unisex | |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Squirt | Slang for a small person | Unisex | |
| Stella | a star | Female | Latin |
| Stella | a star | Female | Latin |
| Storm | Storm
| Male | Word |
| Story | | Male | |
| Sugar | A sweet powder from sugar cane. Slang for sweetheart. | Female | Literary |
| Sugar | A sweet powder from sugar cane. Slang for sweetheart. | Female | Literary |
| Summer | summer season | Female | Word |
| Sun | obedient | Female | Korean |
| Sunday | | Female | |
| Sybil | prophetess | Female | Greek |
| Syd | Variant of Sidney from St. Denis
| Male | |
| Tallulah | leaping water | Female | Irish |
| Talon | large claw of a bird of prey | Male | |
| Tasha | Russian diminutive of Natalya, birthday of the Lord | Female | English |
| Tate | to be cheerful; windy, a great talker | Male | English |
| Teagan | beautiful | Female | Irish |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| Tempest | storm | Female | Word |