| Nicostrato | | nee-ko-STRAH-to | Italian | |
| Nina (1) | | NEE-nah (Russian, Italian, German, Finnish, Polish), NEE-nə (English) | Russian, Italian, English, German, French, Swedish, Norwegian, Danish, Finnish, Dutch, Polish, Slove | |
| Nino (1) | | - | Italian | |
| Nives | | - | Italian, Croatian | |
| Noemi | | naw-E-mee (Italian) | Italian, German, Czech, Biblical Latin | |
| Nora | | NAWR-ə (English), NO-rah (German) | Irish, English, Swedish, Norwegian, Danish, German, Dutch, Italian | |
| Norberto | | nor-BER-to (Spanish, Italian) | Spanish, Portuguese, Italian | |
| Norina | | - | Italian | |
| Norma | | NAWR-mə (English) | English, Italian, Literature | |
| Nunzia | | NOON-tsyah | Italian | |
| Nunziatina | | - | Italian | |
| Nunzio | | NOON-tsyo | Italian | |
| Oddo | | - | Italian | |
| Ofelia | | o-FE-lyah | Spanish, Italian | |
| Olga | | OL-gah (Russian), AWL-gah (Polish, German) | Russian, Ukrainian, Polish, German, Swedish, Norwegian, Danish, Icelandic, Latvian, Hungarian, Itali | |