| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Nuno | - | Portuguese, Medieval Portuguese | ||
| Nur | NOOR (Arabic) | Arabic, Turkish, Urdu, Uyghur, Indonesian, Malay | ||
| Nurul | - | Arabic, Indonesian, Malay | ||
| Nwanneka | - | Western African, Igbo | ||
| Nyoman | - | Indonesian, Balinese | ||
| Obi | - | Western African, Igbo | ||
| OctÁVia | - | Portuguese | ||
| OctÁVio | - | Portuguese | ||
| Odilon | - | French, Portuguese | ||
| OfÉLia | - | Portuguese | ||
| Ogechi | - | Western African, Igbo | ||
| Ogechukwukama | - | Western African, Igbo | ||
| Oghenekaro | - | Western African, Urhobo | ||
| Oghenekevwe | - | Western African, Urhobo | ||
| Oghenero | - | Western African, Urhobo |