| Name | Meaning | Gender | Origin |
|---|
| Penny | Weaver | Female | Greek |
| Pepper | Pepper | Female | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Petal | A section of a flower | Unisex | English |
| Phoebe | Bright | Female | Greek |
| Pickle | | Unisex | Hebrew |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pico | | Unisex | Hebrew |
| Pip | Lover of horses | Unisex | Greek |
| Pippa | Lover of horses | Female | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Pj | | Unisex | Hebrew |
| Poco | Little. | Unisex | English |
| Poppy | Poppy flower | Female | English |
| Porthos | | Unisex | Hebrew |
| Princess | Royal son | Female | English |
| Priscilla | Ancient | Female | Latin |
| Puddles | | Unisex | Hebrew |
| Puma | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Quincy | Fifth | Male | Latin |
| Rags | | Unisex | Hebrew |
| Raquel | Ewe | Female | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rebecca | To tie | Female | Hebrew |
| Rebel | One that resists of defies authority | Unisex | English |
| Rene | Reborn | Male | English |
| Reno | Ruler with counsel | Unisex | Germanic |
| Reuben | Behold, a son | Male | Hebrew |