| Name | Meaning | Gender | Origin |
|---|
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Pickles | Food flavored in a solution of vinegar | Unisex | |
| Pierce | rock | Unisex | |
| Pierce | rock | Male | English |
| Pierre | A rock. Form of Peter.
| Male | |
| Pip | Small seed of a fruit. Also "Pipsqueak" one that is small | Male | English |
| Pippin | Name of a king
| Male | |
| Pipsqueak | | Unisex | Hebrew |
| Pixel | | Male | |
| Pj | | Unisex | |
| Poindexter | | Unisex | |
| Polaris | | Unisex | Hebrew |
| Pollux | crown | Male | Greek |
| Pookie | | Unisex | |
| Pretzel | Glazed, salted and brittle biscuit in the form of a knot or stick. | Male | |
| Prince | Principal one: first. The rock musician Prince.
| Male | Latin |
| Princeton | Principal one: first. The rock musician Prince.
| Male | English |
| Pumpernickle | | Unisex | |
| Pumpkin | Large round fruit with orange skin | Male | |
| Punky | | Unisex | |
| Radar | | Male | |
| Rajah | A prince, king or ruler in India | Male | Hindi |
| Rambo | | Male | |
| Rani | The wife of a Rajah, a queen | Male | Hebrew |
| Ray | kingly | Male | English |