| Name | Meaning | Gender | Origin |
|---|
| Mittens | | Unisex | |
| Mocha | Coffee of high quality. | Female | Arabic |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |
| Motley | | Unisex | |
| Nipper | A small boy | Unisex | |
| Nugget | as in Chicken | Unisex | |
| Penny | Greek, weaver | Female | English |
| Perdita | lost | Female | Latin |
| Pongo | One who smells. | Unisex | |
| Portia | pig, hog or doorway | Female | Latin |
| Princess | Female member of a royal family | Female | Word |
| Purdy | Variation on pretty. | Unisex | |
| Snicker | | Unisex | Hebrew |
| Snickers | A brand of candy bar. | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Snowball | | Unisex | |
| Socks | Short stockings finishing above the ankle | Unisex | |
| Sox | Short stockings finishing above the ankle | Unisex | |
| Sox | Short stockings finishing above the ankle | Unisex | |
| Sparky | Animated, lively. | Unisex | |
| Speckles | | Unisex | Hebrew |
| Splotch | An irregularly shaped spot | Unisex | |
| Spotty | Marked with spots | Unisex | |
| Squeaky | | Unisex | |
| Squirrel | | Unisex | |