| Name | Meaning | Gender | Origin |
|---|
| Nero | stern | Male | Latin |
| Oleo | | Unisex | Hebrew |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Pavarotti | | Unisex | |
| Petit | | Unisex | |
| Phil | | Unisex | |
| Phineas | oracle; dark-skinned | Male | Hebrew |
| Pie | A baked pastry filled with fruit or meat. | Unisex | |
| Piggy | | Unisex | |
| Pigpen | | Unisex | Hebrew |
| Pillow | A cloth case stuffed with something soft to cushion the head during sleep. | Unisex | |
| Poe | peacock | Male | |
| Poo | | Unisex | Hebrew |
| Pookie | | Unisex | |
| Poopsie | | Unisex | |
| Porkchop | | Unisex | Hebrew |
| Porky | | Unisex | Hebrew |
| Pudding | | Unisex | |
| Pudge | | Unisex | |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Male | |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Male | |
| Pumpkin | Large round fruit with orange skin | Male | |
| Ragamuffin | | Unisex | |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |