| Name | Meaning | Gender | Origin |
|---|
| Nisha | Hindu for night | Female | Hindi |
| Noble | aristocratic | Male | Latin |
| Noel | Christmas
| Male | |
| Nola | Noble or Famous | Female | Gaelic |
| Norbert | blond hero | Male | |
| Noriko | doctrine child | Unisex | |
| Norris | Caretaker | Male | |
| North | from the north | Male | Word |
| Nubia | From Nubia Africa, Gold | Unisex | Egyptian |
| Oberon | noble, bearlike | Male | English |
| Obie | O.B. | Unisex | |
| Odessa | odyssey, journey, voyage | Female | Russian |
| Odie | Melody | Unisex | French |
| Ogden | from the oak valley | Male | English |
| Olaf | ancestor's relic | Male | Norse |
| Olga | holy | Female | Russian |
| Olimpia | Mountain Of The Gods | Unisex | Italian |
| Olympia | of Mount Olympus, heavenly | Female | Greek |
| Omar | first son, disciple; gifted speaker; famous | Male | Arabic |
| Omega | great | Male | Greek |
| Omie | | Unisex | |
| Ondine | little wave | Female | Latin |
| 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 |