| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Nikodim | - | Russian, Macedonian | ||
| Nikolai | nee-kah-LIE (Russian) | Russian, Bulgarian | ||
| Nikolay | nee-kah-LIE (Russian) | Russian, Bulgarian | ||
| Nikon | - | Ancient Greek, Russian | ||
| Nina (1) | NEE-nah (Russian, Italian, German, Finnish, Polish), NEE-nə (English) | Russian, Italian, English, German, French, Swedish, Norwegian, Danish, Finnish, Dutch, Polish, Slove | ||
| Nina (4) | NEE-nah | Russian | ||
| Ninel | nee-NYEL | Russian | ||
| Nonna | - | Russian | ||
| Oksana | ahk-SAH-nah (Russian) | Ukrainian, Russian | ||
| Oleg | ah-LYEK | Russian | ||
| Olga | OL-gah (Russian), AWL-gah (Polish, German) | Russian, Ukrainian, Polish, German, Swedish, Norwegian, Danish, Icelandic, Latvian, Hungarian, Itali | ||
| Olya | - | Russian | ||
| Onisim | - | Russian (Rare) | ||
| Osip | O-seep | Russian | ||
| Oxana | - | Ukrainian, Russian |