| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Marius | MER-ee-əs (English), MAR-ee-əs (English), MAH-ree-uws (German) | Ancient Roman, Romanian, German, Dutch, Norwegian, Danish, French | ||
| Martialis | - | Ancient Roman | ||
| Martinus | - | Ancient Roman, Dutch | ||
| Maxentius | - | Ancient Roman | ||
| Maxima | - | Ancient Roman | ||
| Maximianus | - | Ancient Roman | ||
| Maximiliana | - | Ancient Roman | ||
| Maximilianus | - | Ancient Roman | ||
| Maximinus | - | Ancient Roman | ||
| Maximus | - | Ancient Roman | ||
| Naevius | - | Ancient Roman | ||
| Nero (1) | NEER-o (English) | Ancient Roman | ||
| Nerva | - | Ancient Roman | ||
| Nona (2) | - | English, Ancient Roman (Rare) | ||
| Nonus | - | Ancient Roman (Rare) |