| Name | Meaning | Gender | Origin |
|---|
| Sidney | Saint Denis | Female | |
| Sierra | Dark Feminine of Ciaran.
| Female | Spanish |
| Silver | White
| Male | English |
| Sinclair | From Saint Clair sur Elle
| Male | Scottish |
| Sirius | burning | Male | Latin |
| Sitka | | Unisex | Hebrew |
| Sky | The expanse of air over the Earth | Female | Nature |
| Skye | sky, sheltering | Female | Scottish |
| Snow | Frozen crystals that fall in soft, white flakes | Female | English |
| Soleil | sun | Female | |
| Solstice | Sun Exposure | Female | Greek |
| Somerset | From The Summer Settlers | Unisex | English |
| Sonoma | | Female | Hebrew |
| Sonora | Pleasant Sounding | Female | Spanish |
| Sorrel | reddish brown | Male | Botanical |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Spring | spring season | Female | Word |
| Springer | jumper, leaper | Male | English |
| Stanley | Lives by the stony grove
| Male | English |
| Star | A celestial body that emits light. A famous performer. | Female | Word |
| Star | A celestial body that emits light. A famous performer. | Female | Word |
| Stennis | | Unisex | Hebrew |
| Storm | Storm
| Male | Word |
| Stormy | | Female | |