| Name | Meaning | Gender | Origin |
|---|
| Moira | bitter; great | Female | Irish |
| Morag | great | Female | Scottish |
| Morgan | circle; sea | Female | Welsh |
| Morgana | sea-circle | Female | Female |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Narcissa | self-love | Female | Greek |
| Nettle | | Unisex | Hebrew |
| Nightshade | | Unisex | Hebrew |
| Octavia | eighth | Female | Latin |
| October | eighth | Female | Latin |
| Odessa | odyssey, journey, voyage | Female | Russian |
| Oleander | | 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 |
| Ophelia | Serpentine
| Female | Greek |
| Ostara | | Unisex | |
| Paige | page to a lord | Female | English |
| Perdita | lost | Female | Latin |
| 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 |
| Phaedra | Glowing | Female | Greek |
| Philomena | song lover, friend, lover of the moon | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Piper | Piper
| Female | English |