| Name | Meaning | Gender | Origin |
|---|
| Orla | Golden princess | Female | Gaelic |
| Orrin | Little green one | Male | Gaelic |
| Oscar | Divine spear | Male | English |
| Ossian | Little deer | Male | Gaelic |
| Paddy | Patrician | Male | Latin |
| Paige | Page | Female | English |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Pansy | Thought | Female | English |
| Parker | Gamekeeper of a park | Male | English |
| Parlan | Ploughman | Male | English |
| Parry | Son of Harry | Male | Welsh |
| Patrick | Patrician | Male | Latin |
| Patty | A patrician | Female | Latin |
| Pax | Peace | Unisex | Latin |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Peggy | Pearl | Female | Greek |
| Penny | Weaver | Female | Greek |
| Pepper | Pepper | Female | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Perry | Foreigner, stranger | Male | Latin |
| Phelan | Little wolf | Male | Gaelic |
| Phoebe | Bright | Female | Greek |
| Phoenix | Phoenix | Male | Greek |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Piper | A pipe player | Female | English |
| Pippin | Foreigner, stranger | Unisex | Latin |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Pluto | Wealth, riches | Unisex | Greek |
| Polly | Bitter | Female | Hebrew |