| Mirabella | | - | Italian | |
| Mirella | | mee-REL-lah | Italian | |
| Mirko | | - | Serbian, Croatian, Slovene, Macedonian, Italian | |
| Mirta | | - | Spanish, Italian, Croatian | |
| Modesto | | mo-DHE-sto (Spanish, Italian) | Spanish, Italian, Portuguese | |
| Monica | | MAHN-i-kə (English) | English, Italian, Portuguese, Romanian, Late Roman | |
| Nadia (1) | | NAD-yə (English), NAHD-yə (English) | French, English, Italian, Russian, Bulgarian, Ukrainian | |
| Naldo | | - | Italian | |
| Napoleone | | - | Italian | |
| Narcisa | | - | Portuguese, Spanish, Italian, Romanian | |
| Narciso | | nahr-CHEE-so (Italian), nahr-THEE-so (Spanish), nahr-SEE-so (Latin American Spanish) | Italian, Spanish, Portuguese | |
| Natale | | nah-TAH-le | Italian | |
| Natalia | | nah-TAH-lyah (Polish, Italian, Spanish) | Polish, Italian, Spanish, Romanian, Georgian, Late Roman | |
| Natanaele | | - | Italian | |
| Nazario | | nah-TSAH-ryo (Italian), nah-THAH-ryo (Spanish), nah-SAH-ryo (Latin American Spanish) | Italian, Spanish | |