| Name | Meaning | Gender | Origin |
|---|
| Orion | Son of Fire
| Male | Greek |
| Orpheus | | Male | |
| Osiris | with strong eyesight | Male | Egyptian |
| Ouija | | Unisex | Hebrew |
| Paige | page to a lord | Female | English |
| Pandora | talented one | Female | Greek |
| Panther | A black leopard | Male | |
| Patch | A pad or shield worn over one eye. | Male | |
| Patches | | Male | |
| Patience | | Female | |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Persephone | The daughter of Demeter and Zeus who was abducted by Hades but rescued by her mother and thereafter spent six months of the year on earth and six months in the underworld.
| Female | Greek |
| Phantom | Something elusive. A ghost | Unisex | |
| Phoebe | bright one | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Piper | Piper
| Female | English |
| Pirate | | Unisex | |
| Pluto | The ninth and most distant planet from the sun | Male | |
| Poe | peacock | Male | |
| Poltergeist | | Unisex | Hebrew |
| Presley | priest's meadow | Unisex | |
| Prudence | caution | Female | |