| Name | Meaning | Gender | Origin |
|---|
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| 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 | |
| Paige | page to a lord | Female | English |
| Patience | | Female | |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Peggy | pearl | Female | English |
| Persia | | Male | Hebrew |
| Philippa | Lover of Horses. Variant of masculine Philipp.
| Female | Greek |
| Phoebe | bright one | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Pickles | Food flavored in a solution of vinegar | Unisex | |
| Pilar | pillar | Unisex | |
| Piper | Piper
| Female | English |
| Pitty Pat | | Unisex | |
| Pixel | | Male | |
| Pixie | A fairy like creature. Playful and mischievous | Female | |
| Pixie | A fairy like creature. Playful and mischievous | Female | Swedish |
| Pocahontas | Playful, Friendly | Unisex | Native American |
| Pogo | | Unisex | |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |
| Portia | pig, hog or doorway | Female | Latin |
| Pounce | | Unisex | |
| Puck | | Male | |