| Name | Meaning | Gender | Origin |
|---|
| Spider | An eight legged insect | Unisex | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | English |
| Spooky | | Unisex | Hebrew |
| Spot | After Data's cat on Star Trek: The Next Generation | Unisex | English |
| Stormy | Violent weather | Unisex | English |
| Suede | Swedish | Unisex | English |
| Sullivan | Keen eye | Male | Gaelic |
| Talon | A claw | Male | English |
| Ted | Gift of God | Male | Greek |
| Teddy | Gift of God | Male | Greek |
| Tee | Tough | Male | Irish |
| Terrell | Thunder Ruler | Male | English |
| Tex | Of Texas | Unisex | English |
| Thatcher | Roof repairer | Male | English |
| Theo | Gift of God | Male | Greek |
| Thomas | Twin | Male | Aramaic |
| Thor | Thunder | Male | Norse |
| Thumper | To walk with heavy steps | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Tiger | Tiger | Unisex | English |
| Tigger | From Winnie the Pooh | Unisex | English |
| Tike | | Unisex | Hebrew |
| Tiki | Maori figure representing an ancestor. A wooden or stone image of a Polynesian god. | Unisex | English |
| Tilly | Powerful battler | Unisex | Germanic |
| Timber | Wood used as a building material. Also timber-wolf. | Unisex | English |
| Timmy | To honor God, to fear God | Male | Greek |
| Timon | Respect god | Male | Greek |
| Tink | | Unisex | Hebrew |
| Tinker | | Unisex | Hebrew |
| Tinkerbell | | Unisex | Hebrew |