| Name | Meaning | Gender | Origin |
|---|
| Scout | Observer | Unisex | American English |
| Shadow | Shadow | Unisex | English |
| Shaggy | Bushy and matted (hair), unkempt. | Unisex | English |
| Shark | | Unisex | Hebrew |
| Shiloh | Gift for him | Unisex | Hebrew |
| Silver | Silver (the metal or colour) | Male | English |
| Sky | Sky | Unisex | Norse |
| Smirnoff | | Unisex | Hebrew |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Smoky | | Unisex | Hebrew |
| Snowflake | Single flake or crystal of snow. | Unisex | English |
| Sparky | Animated, lively. | Unisex | English |
| Spirit | Part of the human being associated with the mind. Vigorous or animated state - spirited. Also distilled alcohol. | Unisex | English |
| Sunbeam | | Unisex | Hebrew |
| Sunshine | Light from the sun | Unisex | English |
| Tahoe | Edge of the lake | Unisex | Native American |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tanker | | Unisex | Hebrew |
| Teddy | Gift of God | Male | Greek |
| Terminator | | Unisex | Hebrew |
| Thor | Thunder | Male | Norse |
| Thunder | Stormy Tempered | Unisex | English |
| Timber | Wood used as a building material. Also timber-wolf. | Unisex | English |
| Titan | Powerful big man | Unisex | Greek |
| Toby | God is good | Unisex | Hebrew |
| Trojan | | Unisex | Hebrew |
| Tsunami | Tidal wave | Unisex | English |
| Tucker | Someone who folds cloth | Male | English |
| Ulf | Protector of the inheritance | Male | Germanic |
| Ulysses | Walker | Male | Greek |