| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Nigel | NIE-jəl | English | ||
| Nigella | - | English (Rare) | ||
| Nigellus | - | English (Archaic) | ||
| Nigul | - | Estonian | ||
| Niilo | NEE:-lo | Finnish | ||
| Niina | NEE:-nah | Finnish | ||
| Nik | - | English, Greek, Slovene | ||
| Nika (1) | - | Russian | ||
| Nika (2) | - | Slovene, Croatian | ||
| Nikica | - | Croatian, Serbian | ||
| Nikifor | - | Russian, Bulgarian, Macedonian | ||
| Nikita (1) | nee-KEE-tah (Russian) | Russian, Ukrainian, Belarusian | ||
| Nikki | NIK-ee | English | ||
| Nikkole | ni-KOL | English (Rare) | ||
| Niklas | NIK-lahs (Swedish), NEEK-lahs (Finnish) | Swedish, Finnish, Danish, Norwegian, German |