| Name | Meaning | Gender | Origin |
|---|
| Patches | | Unisex | Hebrew |
| Patience | Patience | Female | English |
| Pauline | Small | Female | Latin |
| Paws | | Unisex | Hebrew |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pearl | Pearl | Female | English |
| Pebbles | After the character in 'The Flintstones' cartoons | Female | English |
| Peekaboo | | Unisex | Hebrew |
| Pegasus | Myth Name (Winged Horse) | Unisex | English |
| Penny | Weaver | Female | Greek |
| Peppy | | Unisex | Hebrew |
| Petula | Impatient | Female | Latin |
| Phoebe | Bright | Female | Greek |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pico | | Unisex | Hebrew |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pixel | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Pluto | Wealth, riches | Unisex | Greek |
| 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 |
| Rags | | Unisex | Hebrew |
| Rajah | Anticipation | Unisex | Arabic |