| Name | Meaning | Gender | Origin |
|---|
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Ranger | Gamekeeper | Male | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rhianna | Nymph | Female | Welsh |
| Riley | Rye clearing | Male | English |
| Rina | Pet form of names in -rina | Female | English |
| Rocco | Battle cry | Male | Germanic |
| Rocky | Battle cry | Male | Germanic |
| Roscoe | Roe deer wood | Male | Norse |
| Rosey | Rose | Unisex | Latin |
| Rosie | Rose | Female | Latin |
| Roxy | Star | Female | Persian |
| Sadie | Princess | Female | Hebrew |
| 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 |
| Scooby | | Unisex | Hebrew |
| Scooter | One who goes suddenly and speedily. | Unisex | English |
| Scout | Observer | Unisex | American English |
| Shania | Beautiful | Female | Yiddish |
| Sheba | Daughter of an oath | Female | Hebrew |
| Shelby | A place where willows grow | Female | American English |
| Shorty | Of less than average size | Unisex | English |
| Simba | Lion | Female | Swahili |
| Skippy | Master of a Ship | Unisex | American English |