| Name | Meaning | Gender | Origin |
|---|
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pearl | Pearl | Female | English |
| Pegasus | Myth Name (Winged Horse) | Unisex | English |
| Penny | Weaver | Female | Greek |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| 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 |
| Pookie | | Unisex | Hebrew |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Radar | | Unisex | Hebrew |
| Rajah | Anticipation | Unisex | Arabic |
| Rascal | One that is playfully mischievous | Unisex | English |
| Reggie | Ruler with counsel | Unisex | Germanic |
| Rina | Pet form of names in -rina | Female | English |
| Romy | Sea dew | Unisex | Latin |
| Rosa | Rose | Female | Latin |
| Rosie | Rose | Female | Latin |
| Rowdy | Boisterous. Western Nickname. | Unisex | English |
| Roxy | Star | Female | Persian |
| Rusty | Rusty, full of rust | Unisex | American English |
| Sadie | Princess | Female | Hebrew |
| Samantha | Listener | Female | Aramaic |
| Sammy | His name is God | Unisex | Hebrew |
| Sarah | Princess | Female | Hebrew |
| Sasha | Defending men | Unisex | Greek |