| Name | Meaning | Gender | Origin |
|---|
| Neptune | | Male | |
| Nerida | Aboriginal for red water lily | Female | Greek |
| Nesbit | land or river bend shaped like a nose | Male | English |
| Nevada | Snow-clad. A western USA state.
| Male | Spanish |
| Nimbus | | Unisex | |
| Njord | Viking mythology: the god of wind and sea | Male | Scandinavian |
| Noah | Comfort
| Male | Hebrew |
| Nun | | Unisex | |
| Nyla | winner | Female | Arabic |
| Ocean | | Male | |
| Oki | Ocean Centered | Unisex | Japanese |
| Oklahoma | | Male | Hebrew |
| Ondine | little wave | Female | Latin |
| Orca | | Unisex | |
| Orman | spearman | Unisex | |
| Osiris | with strong eyesight | Male | Egyptian |
| Oxford | From the ox ford
| Male | English |
| Pacific | tranquil | Male | |
| Pasha | small | Male | Russian |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Pegasus | | Male | |
| Percival | Hero of several Arthurian stories
| Male | |
| 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 |
| Phoenix | Mystical Bird, Purple
| Male | Greek |
| Phoenix | Mystical Bird, Purple
| Male | Greek |