| Name | Meaning | Gender | Origin |
|---|
| Mushu | | Unisex | |
| Mustard | Seeds ground into paste and used as a spicy condiment | Unisex | |
| Mut | Mother | Unisex | Egyptian |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Mystic | | Unisex | Hebrew |
| Nai | | Unisex | |
| Nala | African for love, after the character in the Lion King movies | Female | African |
| Nana | A grandmother. | Female | English |
| Naomi | pleasent one; above all, beauty | Female | Hebrew |
| Nemesis | | Unisex | Hebrew |
| Nibbles | | Unisex | |
| Nibs | | Unisex | Hebrew |
| Nona | ninth | Female | Latin |
| Noni | Gift Of God | Unisex | African |
| Nox | latin for night | Unisex | |
| Nuka | | Unisex | |
| Nutella | | Unisex | |
| Nutsy | | Unisex | Hebrew |
| Nyla | winner | Female | Arabic |
| Nyx | Greek goddess of night | Female | Greek |
| Obsidian | | Unisex | |
| Odie | Melody | Unisex | French |
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| Olivia | Olive
| Female | Latin |
| Olly | | Unisex | |