| Name | Meaning | Gender | Origin |
|---|
| Rover | A wanderer | Unisex | |
| Rufus | Red haired | Male | Latin |
| Sabine | Of Sabine, Italy | Unisex | French |
| Sallie | Princess | Unisex | English |
| Samson | Bright sun
| Male | Hebrew |
| Scout | One dispatched from main body to gather information | Male | Word |
| Shilo | | Unisex | |
| Socks | Short stockings finishing above the ankle | Unisex | |
| Sparky | Animated, lively. | Unisex | |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Spot | after Data's cat on Star Trek: The Next Generation | Male | |
| Spud | Slang for potato. | Male | |
| Tanner | leather worker | Male | English |
| Ted | English, wealthy guardian | Male | English |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| Toby | God is Good | Male | English |
| Toto | | Unisex | |
| Tramp | To travel on foot. A vagrant. | Unisex | |
| Trapper | One who traps animals for their fur. | Unisex | |
| Ulysses | Greek mythology name, wrathful | Male | Latin |
| Walt | Army Ruler | Male | English |
| Walter | Powerful ruler
| Male | |
| Wilbur | resolute, brilliant | Male | |
| Winston | From a friend's estate. joy stone, victory town | Male | English |