| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Nyah | - | Eastern African, Swahili | ||
| Nyarai | - | Southern African, Shona | ||
| Nydia | NID-ee-ə (English) | English (Rare), Spanish, Literature | ||
| Nymphodora | - | Ancient Greek | ||
| Nynke | NEEN-kə | Frisian | ||
| Nynniaw | - | Ancient Celtic | ||
| Nyoman | - | Indonesian, Balinese | ||
| Nyree | NIE-ree | English (New Zealand) | ||
| Oana | WAH-nah | Romanian | ||
| Obdulia | - | Spanish | ||
| Obi | - | Western African, Igbo | ||
| Obrad | - | Serbian | ||
| Ochieng | - | Eastern African, Luo | ||
| Octavia | ahk-TAYV-ee-ə (English) | English, Spanish, Ancient Roman | ||
| Octavian | ahk-TAYV-ee-ən (English) | History, Romanian |