| Name | Meaning | Gender | Origin |
|---|
| Opal | Australian gemstone of remarkable colours, usually red, blue or green | Female | Sanskrit |
| Opal | Australian gemstone of remarkable colours, usually red, blue or green | Female | Sanskrit |
| Orange | Round citrus fruit originating in Southeast Asia. | Female | Fruit |
| Orange | Round citrus fruit originating in Southeast Asia. | Female | Fruit |
| Orchid | | Female | |
| Pallas | wisdom | Female | Greek |
| Pandora | talented one | Female | Greek |
| Papaya | | Unisex | |
| Paprika | Spicy powder made from sweet red peppers. | Unisex | |
| Paris | Brand of perfume. | Female | |
| Parsley | Herb used for seasoning or as a garnish. | Unisex | |
| Pavarotti | | Unisex | |
| Peach | | Unisex | |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Pebble | | Unisex | |
| Pecan | | Unisex | Hebrew |
| Peewee | | Unisex | |
| Pele | Hawaiian volcano goddess. | Female | Hawaiian |
| Penny | Greek, weaver | Female | English |
| Peony | flower name | Female | |
| Perdita | lost | Female | Latin |
| Petunia | trumpet-shaped flower | Female | English |
| Phobos | The personification of fear in Greek mythology | Unisex | Greek |
| Phoebe | bright one | Female | Greek |