| Name | Meaning | Gender | Origin |
|---|
| Napoleon | Hound Dog from the AristoCats
| Male | Greek |
| Nathrach | Snake
| Male | |
| Nevada | Snow-clad. A western USA state.
| Male | Spanish |
| Nigel | Black haired one. | Male | Irish |
| Night | | Male | |
| Nilson | | Unisex | Hebrew |
| Nina | Girl
| Female | Russian |
| Noa | Movement
| Female | Hebrew |
| Nolan | Noble
| Male | Irish |
| Nuggie | | Unisex | Hebrew |
| Nuisance | | Male | Hebrew |
| Nuno | Nine | Unisex | Portuguese |
| Nutmeg | | Male | |
| Oboe | | Unisex | |
| Odie | Melody | Unisex | French |
| Ody | | Unisex | |
| Olaf | ancestor's relic | Male | Norse |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Olympe Maxine | Half-giant headmistress of Beauxbatons Academy.
| Female | |
| Omar | first son, disciple; gifted speaker; famous | Male | Arabic |
| 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 | |
| Oro | Gold
| Male | Spanish |
| Osana | Health
| Female | |