| Name | Meaning | Gender | Origin | 
| Olivia | Elf army | Female | English | 
| Omega | Great | Female | English | 
| Opal | Jewel, gem | Female | Sanskrit | 
| Papillon | Butterfly | Female | English | 
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English | 
| Pearl | Pearl | Female | English | 
| Pebbles | After the character in 'The Flintstones' cartoons | Female | English | 
| Penny | Weaver | Female | Greek | 
| Petey | Stone | Unisex | Greek | 
| Piccolo |  | Unisex | Hebrew | 
| Pico |  | Unisex | Hebrew | 
| Pippin | Foreigner, stranger | Unisex | Latin | 
| Pipsqueak |  | Unisex | Hebrew | 
| Pixel |  | Unisex | Hebrew | 
| Pixie | A fairy like creature. Playful and mischievous | Female | English | 
| Pluto | Wealth, riches | Unisex | Greek | 
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | English | 
| Powder | Substance of fine particles. Light, dry snow. | Unisex | English | 
| Prisca | Ancient | Female | Latin | 
| Priscilla | Ancient | Female | Latin | 
| Puck | Elf | Unisex | English | 
| Pumpkin | Large round fruit with orange skin | Unisex | English | 
| Quark | Subatomic particle | Unisex | English | 
| Queenie | Female ruler | Female | English | 
| Quimby | From the woman's estate | Unisex | English | 
| Radar |  | Unisex | Hebrew | 
| Rafiki | Friend | Unisex | Arabic | 
| Raissa | Thinker | Female | English | 
| Rascal | One that is playfully mischievous | Unisex | English | 
| Reno | Ruler with counsel | Unisex | Germanic |