| Matthias | | mah-TEE-ahs (German), mə-THIE-əs (English) | Greek, German, Swedish, Norwegian, Danish, French, Dutch, Biblical, Biblical Latin, Biblical Greek | |
| Max | | MAHKS (German), MAKS (English) | German, English, Swedish, Norwegian, Danish, Dutch | |
| Maximilian | | mahk-see-MEE-lee-ahn (German), mak-si-MIL-ee-ən (English), mak-si-MIL-yən (English) | German, English, Swedish, Norwegian, Danish | |
| Merete | | - | Danish | |
| Meta | | ME-tah (German) | German, Swedish, Norwegian, Danish | |
| Mette | | ME-de (Danish) | Danish, Norwegian | |
| Mia | | MEE-ah (Swedish, Norwegian, Danish, Dutch, German), MEE-ə (English) | Swedish, Norwegian, Danish, Dutch, German, English | |
| Michael | | MIE-kəl (English), MI-khah-el (German), MEE-kah-el (Swedish, Norwegian, Danish) | English, German, Swedish, Norwegian, Danish, Dutch, Czech, Biblical, Biblical Latin, Biblical Greek | |
| Mikael | | MEE-kah-el | Swedish, Norwegian, Danish, Finnish | |
| Mikaela | | MEE-kah-e-lah (Finnish) | Swedish, Norwegian, Danish, Finnish | |
| Mikkel | | MEEK-kel (Danish, Norwegian), MEEG-gel (Danish) | Danish, Norwegian | |
| Mikkeline | | - | Danish | |
| Milla | | MEEL-lah (Finnish) | Swedish, Norwegian, Danish, Finnish | |
| Mogens | | - | Danish | |
| Mona (2) | | - | Swedish, Norwegian, Danish | |