| Nowla | Descendant of Nuall |
| Nuadei | One who is truly cherished. |
| Nubeerah | A woman of noble character. |
| Nuhansha | A beautiful and graceful soul. |
| Nujhat | Cheerfulness, Safety, Happiness |
| Numina | Divine power or holy spirit. |
| Nunita | A name meaning little sister. |
| Nurlita | A radiant and shining light. |
| Nusreen | A Kind of Flower |
| Nuwandara | A person of great wisdom. |
| Nuzla | A gift or a generous offering. |
| Nyana | A name meaning little girl. |
| Nzinga | A name meaning to twist or turn. |
| Odine | Derived from the word for valley. |
| Ohi | A name meaning to be very joyful. |
| Oliue | A variant of the olive tree name. |
| Olyve | A symbol of grace and kindness. |
| Omitha | One who is full of light. |
| Omkarasawari | An Auspicious Beginning |
| Omuila | One who brings deep peace. |
| Oneesha | A name meaning pure and holy. |
| Onisha | A name meaning one who is night. |
| Oportuna | A name meaning timely or lucky. |
| Orawin | A friend of golden light. |
| Oriella | A name meaning golden sunlight. |
| Ornagrine | A golden and green spirit. |
| Oroni | A golden and noble person. |
| Orsa | A name meaning little female bear cub. |
| Orseline | A name meaning little golden bear. |
| Orsi | A Hungarian name meaning little bear. |
| Orwina | A friend of the golden spear. |
| Oryon | Boundary, limit |
| Oshana | A name meaning bright light. |
| Oshani | A name meaning a shining star. |
| Oshrat | A name meaning happy blessing. |
| Osmel | Derived from the Latin word 'os,' meaning mouth, and the suffix '-mel.' |
| Osthryth | Godly protection |
| Ostrythe | Noble divine power |
| Ottiilia | Fatherland, Fortunate Heroine |
| Oute | A name meaning one who is outside. |