| Mahler | Unisex | German Names |
| Mandel | Unisex | German Names |
| Mandell | Unisex | German Names |
| Manfred | Man | German Names |
| Manric | Man | German Names |
| Manrico | Man | German Names |
| Margareta | Woman | German Names |
| Marita | Woman | German Names |
| Marla | Woman | German Names |
| Marlena | Woman | German Names |
| Marlene | Woman | German Names |
| Marlis | Woman | German Names |
| Mathilda | Woman | German Names |
| Maxi | Man | German Names |
| Mayer | Man | German Names |
| Medwin | Man | German Names |
| Mendel | Man | German Names |
| Mendie | Unisex | German Names |
| Meta | Woman | German Names |
| Mikkel | Unisex | German Names |