| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Mac Beatha | - | Medieval Scottish | ||
| Mack (2) | - | Medieval English | ||
| Malle | - | Medieval English | ||
| Matty (2) | - | Medieval English | ||
| Mechislav | - | Russian (Rare), Medieval Slavic | ||
| Meggy | - | Medieval English | ||
| Melisende | - | Medieval French | ||
| Militsa | - | Medieval Slavic | ||
| Milivoj | MEE-lee-voi (Croatian, Serbian) | Croatian, Serbian, Slovene, Medieval Slavic | ||
| Milodrag | - | Medieval Slavic (Hypothetical) | ||
| Milogost | - | Medieval Slavic | ||
| Milosh | - | Medieval Slavic | ||
| Miloslav | - | Czech, Slovak, Medieval Slavic | ||
| Miloslava | - | Czech, Medieval Slavic | ||
| Mirche | - | Macedonian, Medieval Slavic |