| Name | Meaning | Gender | Origin |
|---|
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Poco | Little. | Unisex | English |
| Pogo | | Unisex | Hebrew |
| Poko | | Unisex | Hebrew |
| Pookie | | Unisex | Hebrew |
| Poppy | Poppy flower | Female | English |
| Powder | Substance of fine particles. Light, dry snow. | Unisex | English |
| Pretty | | Unisex | Hebrew |
| Princess | Royal son | Female | English |
| 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 |
| Purity | Purity | Female | English |
| Queenie | Female ruler | Female | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Riley | Rye clearing | Male | English |
| Rina | Pet form of names in -rina | Female | English |
| Robin | Bright fame | Female | Germanic |
| Rocky | Battle cry | Male | Germanic |
| Roger | Famous spear | Male | English |
| 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 |