| Nicolle | Victory of the people. |
| Ninette | A name meaning little girl. |
| Ninon | A French name meaning favor. |
| Noel | A name meaning born on Christmas. |
| Noele | Birthday. Feminine of Noel. Commonly refers to Christ's birth and Christmas festival. |
| Noeleen | Feminine form of Noel: Christmas. |
| Noeline | Feminine form of Noel: Christmas. |
| Noell | Birthday. Feminine of Noel. Commonly refers to Christ's birth and Christmas festival. |
| Noella | A name meaning Christmas holiday. |
| Noemie | Variant of Hebrew Naomi Pleasantness. |
| Noreis | One who comes from the northern sea. |
| Norice | A person from the northern territory. |
| Norm | A name meaning man from the north. |
| Norman | A name meaning man from the north. |
| Normand | A name meaning man from the north. |
| Normandy | Provence in france |
| Nouel | Derived from the French for Christmas. |
| Nycole | Same as Nicole or Nichole |
| Nynette | Variant of Anne prayer. Ninon de Lenclos - seventeenth-century aristocrat famous for her wit and beauty. |
| Octave | The eighth in a musical series. |
| Odeletta | A small, melodic song or poem. |
| Odelette | A short, lyrical musical piece. |
| Odetta | Wealthy, rich, or prosperous. |
| Odil | A name meaning prosperous or rich. |
| Odile | A name meaning prosperous in battle. |
| Odo | Name of a bishop |
| OGIER | A name meaning spear warrior. |
| Olivier | From the olive tree |
| Olympe | Meaning of the divine mountain. |
| Olympia | Of the heavens or Olympus |
| Onfroi | A name meaning a peaceful ruler. |
| ONille | From the gold town |
| Ophelia | Help. Serpentine. In Shakespeare's 'Hamlet', Ophelia was the lover of Hamlet who went insane as a result of his irrational behavior.; Helper; 'Hamlet, Prince of Denmark' Daughter to Polonius.; One who offers help to others; Serpentine |
| Ophelie | One who provides helpful aid. |
| Orane | A name meaning rising or dawning. |
| Oriel | A name meaning my light is God or angel. |
| Orleans | Derived from golden city name. |
| Orlena | A name meaning golden girl. |
| Orlene | A name meaning golden one. |
| Orlina | Derived from the golden color. |