| Name | Meaning | Gender | Origin |
|---|
| Poco | Little. | Unisex | English |
| Pogo | | Unisex | Hebrew |
| Poko | | Unisex | Hebrew |
| Pookie | | Unisex | Hebrew |
| Powder | Substance of fine particles. Light, dry snow. | Unisex | English |
| Pretty | | Unisex | Hebrew |
| Puddles | | Unisex | Hebrew |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Unisex | English |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Riley | Rye clearing | Male | English |
| Rocky | Battle cry | Male | Germanic |
| Roger | Famous spear | Male | English |
| Sam | He is called god | Male | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sandy | Defending men | Male | Greek |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Scooter | One who goes suddenly and speedily. | Unisex | English |
| Shorty | Of less than average size | Unisex | English |
| Silver | Silver (the metal or colour) | Male | English |
| Simon | Listening | Male | Hebrew |
| Skippy | Master of a Ship | Unisex | American English |
| Slim | Slender in proportion to height. | Unisex | English |
| Smiley | | Unisex | Hebrew |
| Snoopy | | Unisex | Hebrew |
| Snowball | | Unisex | Hebrew |
| Sparky | Animated, lively. | Unisex | English |
| Squirt | Slang for a small person | Unisex | English |
| Steve | Crown | Male | Greek |