| Name | Meaning | Gender | Origin |
|---|
| Odie | Woad hill | Unisex | English |
| Oliver | Elf army | Male | French |
| Ollie | Elf army | Male | French |
| Opal | Jewel, gem | Female | Sanskrit |
| Oscar | Divine spear | Male | English |
| Otis | One who hears well | Male | Greek |
| Pamela | Made From Honey | Female | Literary |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Penny | Weaver | Female | Greek |
| Pepper | Pepper | Female | English |
| Peppy | | Unisex | Hebrew |
| Pip | Lover of horses | Unisex | Greek |
| Piper | A pipe player | Female | English |
| Pipsqueak | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Poco | Little. | Unisex | English |
| Pookie | | Unisex | Hebrew |
| Popeye | | Unisex | Hebrew |
| Preston | Priest settlement | Male | English |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Quincy | Fifth | Male | Latin |
| Raisin | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Riley | Rye clearing | Male | English |
| Rina | Pet form of names in -rina | Female | English |
| Ripley | Separate | Male | English |