| Name | Meaning | Gender | Origin |
|---|
| Opal | Australian gemstone of remarkable colours, usually red, blue or green | Female | Sanskrit |
| Ophelia | Serpentine
| Female | Greek |
| 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 | |
| Orson | Little bear
| Male | Latin |
| Oscar | God's spear.
| Male | English |
| Pacey | Peaceful | Female | English |
| Paige | page to a lord | Female | English |
| Paloma | Dove
| Female | Spanish |
| Pamela | honeyed | Female | English |
| Pancho | Nickname for Francisco and Frank.
| Male | Spanish |
| Paris | Brand of perfume. | Female | |
| Parker | cultivated land | Male | English |
| Peaches | Red, yellow skinned fleshy fruit | Female | English |
| Peaches | Red, yellow skinned fleshy fruit | Female | English |
| Pebbles | after the character in 'The Flintstones' cartoons | Male | |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Peter | A rock. Peter the biblical fisherman and apostle had impulsive nature and rocklike faith. In Catholic tradition he is the first pope.
| Male | Greek |
| Petunia | trumpet-shaped flower | Female | English |
| Peyton | From The Fighter's Farm | Female | English |
| Phoebe | bright one | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Pickle | | Unisex | Hebrew |