| Maximianus | | - | Ancient Roman | |
| Maximiliana | | - | Ancient Roman | |
| Maximilianus | | - | Ancient Roman | |
| Maximinus | | - | Ancient Roman | |
| Maximus | | - | Ancient Roman | |
| Meginfrid | | - | Ancient Germanic | |
| Meginhard | | - | Ancient Germanic | |
| Meginrat | | - | Ancient Germanic | |
| Meino | | MIE-no (German, Dutch) | German, Dutch, Ancient Germanic | |
| Meinrad | | MIEN-raht (German) | German, Ancient Germanic | |
| Melanthios | | - | Greek Mythology, Ancient Greek | |
| Melissa | | mə-LIS-ə (English) | English, Dutch, Ancient Greek, Greek Mythology | |
| Meliton | | - | Ancient Greek, Georgian | |
| Melitta | | me-LI-tah (German) | Ancient Greek, German | |
| Menes | | - | Ancient Egyptian | |