| Snoopy | | Male | |
| 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 | |
| Storm | Storm
| Male | Word |
| Story | | Male | |
| Syd | Variant of Sidney from St. Denis
| Male | |
| Talon | large claw of a bird of prey | Male | |
| Tate | to be cheerful; windy, a great talker | Male | English |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Timon | worthy | Male | Greek |
| Tiny | Extremely small | Unisex | |
| Toby | God is Good | Male | English |
| Travis | crossing | Male | |
| Trent | the flooder | Male | English |
| Tripp | traveler | Male | Word |
| Tucker | Tucker of doth
| Male | English |
| Tuffy | | Unisex | |
| Twinkie | A cream filled cake. | Unisex | |
| Twister | A cyclone or tornado. | Unisex | |
| Victor | Victor
| Male | Latin |