| Name | Meaning | Gender | Origin |
|---|
| Mischief | One that causes minor trouble or disturbances | Unisex | English |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Muffy | | Unisex | Hebrew |
| Nicky | Victory of the people | Unisex | Greek |
| Nipper | A small boy | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Puss | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rebel | One that resists of defies authority | Unisex | English |
| Rogue | | Unisex | Hebrew |
| Roo | | Unisex | Hebrew |
| Roxie | Star | Unisex | Persian |
| Rusty | Rusty, full of rust | Unisex | American English |
| Ryder | One who rides | Unisex | English |
| Sable | Sable (black) | Unisex | English |
| Sabre | | Unisex | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Scout | Observer | Unisex | American English |
| Shadow | Shadow | Unisex | English |
| Shilo | Gift for him | Unisex | Hebrew |
| Sky | Sky | Unisex | Norse |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Smokie | | Unisex | Hebrew |
| Smoky | | Unisex | Hebrew |
| Smudge | A blotch or smear | Unisex | English |