| Name | Meaning | Gender | Origin |
|---|
| Magnum | A large type of wine bottle. | Unisex | English |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Mikey | Who is like God? | Unisex | Hebrew |
| Mocha | Coffee of high quality. | Unisex | English |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Ninja | | Unisex | Hebrew |
| Queen | Female ruler | Unisex | English |
| Rags | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Reggie | Ruler with counsel | Unisex | Germanic |
| Rogue | | Unisex | Hebrew |
| Rolo | Burmese | Unisex | English |
| Sable | Sable (black) | Unisex | English |
| Sabre | | Unisex | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sasha | Defending men | Unisex | Greek |
| Sasquatch | Has extra toes and hence is a bigfoot | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Socks | Short stockings finishing above the ankle | Unisex | English |
| Soda | A carbonated water. | Unisex | English |
| Sooty | Covered with soot | Unisex | English |
| Tango | | Unisex | Hebrew |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tex | Of Texas | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Tilly | Powerful battler | Unisex | Germanic |
| Titan | Powerful big man | Unisex | Greek |
| Toby | God is good | Unisex | Hebrew |
| Trojan | | Unisex | Hebrew |