| Name | Meaning | Gender | Origin |
|---|
| Pax | Peace | Unisex | Latin |
| Penny | Weaver | Female | Greek |
| Pepper | Pepper | Female | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Phantom | Something elusive. A ghost | Unisex | English |
| Phoebe | Bright | Female | Greek |
| Phoenix | Phoenix | Male | Greek |
| Phyllis | Foliage | Female | Greek |
| Pia | Pious | Female | Latin |
| Piccolo | | Unisex | Hebrew |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pig | | Unisex | Hebrew |
| Pikachu | | Unisex | Hebrew |
| Pilar | Pillar | Female | Spanish |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pipa | | Unisex | Hebrew |
| Piper | A pipe player | Female | English |
| Pippa | Lover of horses | Female | Greek |
| Pippi | Lover of horses | Unisex | Greek |
| Pirate | | Unisex | Hebrew |
| Pita | The fourth girl baby | Unisex | African |
| Pixel | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Pluto | Wealth, riches | Unisex | Greek |
| Pocket | | Unisex | Hebrew |
| Pogo | | Unisex | Hebrew |
| Pokey | | Unisex | Hebrew |
| Polly | Bitter | Female | Hebrew |
| Pollyanna | Combination of Polly and Anna | Unisex | English |
| Polo | Brave wanderer | Male | English |