| Name | Meaning | Gender | Origin |
|---|
| Noble | High-born, distinguished | Male | English |
| Oliver | Elf army | Male | French |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Oscar | Divine spear | Male | English |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Poco | Little. | Unisex | English |
| Prince | Royal son | Male | English |
| Puddles | | Unisex | Hebrew |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Unisex | English |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Rags | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Riley | Rye clearing | Male | English |
| Rin | Cold | Unisex | Japanese |
| Ringo | Apple, peace be with you | Male | English |
| Rio | River | Male | Spanish |
| Rocky | Battle cry | Male | Germanic |
| Rollo | Famous wolf | Male | English |
| Roxie | Star | Unisex | Persian |
| Rusty | Rusty, full of rust | Unisex | American English |
| Ryo | Fact | Unisex | Japanese |
| Saki | Rare blossoming | Unisex | Japanese |
| Sam | He is called god | Male | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Scooter | One who goes suddenly and speedily. | Unisex | English |