| Name | Meaning | Gender | Origin |
|---|
| Pip | Lover of horses | Unisex | Greek |
| Piper | A pipe player | Female | English |
| Pippi | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Poco | Little. | Unisex | English |
| Pooh | | Unisex | Hebrew |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rina | Pet form of names in -rina | Female | English |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rosie | Rose | Female | Latin |
| Roxy | Star | Female | Persian |
| Ruby | Red | Female | Latin |
| Rusty | Rusty, full of rust | Unisex | American English |
| Sadie | Princess | Female | Hebrew |
| Sally | Princess | Female | Hebrew |
| Samantha | Listener | Female | Aramaic |
| Sammy | His name is God | Unisex | Hebrew |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Scotch | Scotch whiskey. | Unisex | English |
| Selby | A place where willows grow | Female | American English |
| Shadow | Shadow | Unisex | English |
| Sheba | Daughter of an oath | Female | Hebrew |
| Shelby | A place where willows grow | Female | American English |
| Shorty | Of less than average size | Unisex | English |