| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| MÁEl Sechlainn | - | Ancient Irish | ||
| MÁEl Sechnaill | - | Ancient Irish | ||
| Maeleachlainn | - | Ancient Irish | ||
| Magnhildr | - | Ancient Scandinavian | ||
| Magni | - | Ancient Scandinavian, Norse Mythology | ||
| Mahthildis | - | Ancient Germanic | ||
| Manius | - | Ancient Roman | ||
| Manlius | - | Ancient Roman | ||
| Manno | - | Ancient Germanic | ||
| Marcella | - | Italian, German, Ancient Roman | ||
| Marcellina | - | Ancient Roman | ||
| Marcellinus | - | Ancient Roman | ||
| Marcellus | - | Ancient Roman, German, Dutch | ||
| Marcia | MAHR-shə (English), MAHR-see-ə (English), MAHR-thyah (Spanish), MAHR-syah (Latin American Spanish) | English, Spanish, Ancient Roman | ||
| Marciana | - | Ancient Roman, Portuguese (Brazilian) |