| Name | Meaning | Gender | Origin |
|---|
| Patches | | Unisex | Hebrew |
| Patrick | Patrician | Male | Latin |
| Pauline | Small | Female | Latin |
| Paws | | Unisex | Hebrew |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pearl | Pearl | Female | English |
| Peewee | | Unisex | Hebrew |
| Penny | Weaver | Female | Greek |
| Phelan | Little wolf | Male | Gaelic |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Piper | A pipe player | Female | English |
| 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 |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Quillan | Descendant of Coll | Male | Gaelic |
| Quimby | From the woman's estate | Unisex | English |
| Quincy | Fifth | Male | Latin |
| Quinlan | Gently-shaped fellow | Male | Gaelic |
| Quinn | Descendent of Cuinn | Male | Gaelic |
| Rafferty | Wielder of prosperity | Unisex | Gaelic |
| Rainbow | Rainbow | Unisex | English |
| Rania | Contented | Female | Arabic |