| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Muirne | - | Irish Mythology | ||
| Murchadh | - | Irish, Scottish | ||
| Murdoch | - | Irish | ||
| Muriel | MYUR-ee-əl (English), MUR-ee-əl (English), muy-ree-EL (French) | English, French, Irish | ||
| Murna | MUR-na | Irish | ||
| Murphy | MUR-fee | Irish, English | ||
| Murrough | - | Irish | ||
| Murtagh | - | Irish | ||
| Myrna | MUR-na | Irish | ||
| NÓIrÍN | - | Irish | ||
| NÓRa | - | Hungarian, Irish | ||
| NainsÍ | - | Irish | ||
| Naoise | NEE-sha | Irish, Scottish, Irish Mythology | ||
| Naomh | NEEV | Irish | ||
| NaomhÁN | - | Irish, Scottish |