| Mona (2) | | - | Swedish, Norwegian, Danish | |
| Monika | | MO-ni-kah (German), maw-NEE-kah (Polish) | German, Swedish, Norwegian, Danish, Czech, Slovak, Polish, Slovene, Croatian, Lithuanian, Latvian | |
| Morten | | MOR-ten | Danish, Norwegian | |
| Nanna (1) | | NAN-nah (Danish), NAHN-nah (Swedish, Norwegian, Icelandic) | Danish, Swedish, Norwegian, Icelandic, Norse Mythology | |
| Nels | | - | Danish | |
| Niels (1) | | NILS | Danish | |
| Niklas | | NIK-lahs (Swedish), NEEK-lahs (Finnish) | Swedish, Finnish, Danish, Norwegian, German | |
| Nikolaj | | - | Danish, Slovene | |
| Nils | | - | Swedish, Norwegian, Danish | |
| Nina (1) | | NEE-nah (Russian, Italian, German, Finnish, Polish), NEE-nə (English) | Russian, Italian, English, German, French, Swedish, Norwegian, Danish, Finnish, Dutch, Polish, Slove | |
| Njord | | - | Norse Mythology, Swedish, Norwegian, Danish | |
| Nora | | NAWR-ə (English), NO-rah (German) | Irish, English, Swedish, Norwegian, Danish, German, Dutch, Italian | |
| Olaf | | O-lahf (German, Dutch) | Norwegian, Danish, German, Dutch, Polish | |
| Olav | | - | Norwegian, Danish | |
| Ole | | OL-e (Danish) | Danish, Norwegian | |