| Name | Meaning | Gender | Origin |
|---|
| Noire | | Unisex | |
| Obsidian | | Unisex | |
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| 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 |
| Opaline | Precious Jewel | Unisex | English |
| Padme | | Unisex | Hebrew |
| Patty | patrician | Female | English |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Peg | pearl | Female | English |
| Peggie | | Unisex | |
| Peggy | pearl | Female | English |
| Penny | Greek, weaver | Female | English |
| Pere | Rock | Unisex | Catalan |
| Petr | Rock | Unisex | Czechoslovakian |
| Petra | rock, stone | Female | Greek |
| Petros | Rock | Unisex | Greek |
| Phailin | | Unisex | |
| Phyllis | A green branch.
| Female | Greek |
| Pierce | rock | Unisex | |
| Platinum | | Unisex | |
| Polly | Bitter
| Female | English |
| Polly | Bitter
| Female | English |
| Precious | One who is beloved, a darling. | Female | Latin |
| Princess | Female member of a royal family | Female | Word |