| Name | Meaning | Gender | Origin |
|---|
| Parker | Gamekeeper of a park | Male | English |
| Parlan | Ploughman | Male | English |
| Parry | Son of Harry | Male | Welsh |
| Patrick | Patrician | Male | Latin |
| Pax | Peace | Unisex | Latin |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Perry | Foreigner, stranger | Male | Latin |
| Phelan | Little wolf | Male | Gaelic |
| Phoenix | Phoenix | Male | Greek |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pippin | Foreigner, stranger | Unisex | Latin |
| Pluto | Wealth, riches | Unisex | Greek |
| Pooka | | Unisex | Hebrew |
| Prince | Royal son | Male | English |
| Quillan | Descendant of Coll | Male | Gaelic |
| Quin | Fifth | Unisex | Latin |
| Quinlan | Gently-shaped fellow | Male | Gaelic |
| Quinn | Descendent of Cuinn | Male | Gaelic |
| Rafferty | Wielder of prosperity | Unisex | Gaelic |
| Rage | | Unisex | Hebrew |
| Raghnall | Strong | Male | English |
| Ralph | Wolf council | Male | Germanic |
| Randy | Shield rim | Male | Germanic |
| Rascal | One that is playfully mischievous | Unisex | English |
| Reagan | Descendent of Riagán | Unisex | Gaelic |
| Rebel | One that resists of defies authority | Unisex | English |
| Regan | Regal | Male | Gaelic |
| Reggie | Ruler with counsel | Unisex | Germanic |