| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Meadhbh | MAYV | Irish, Irish Mythology | ||
| Medb | - | Irish Mythology | ||
| Morrigan | - | Irish Mythology | ||
| Muirenn | - | Irish, Irish Mythology | ||
| Muirgen | - | Irish, Irish Mythology | ||
| Muirne | - | Irish Mythology | ||
| Naoise | NEE-sha | Irish, Scottish, Irish Mythology | ||
| Neas | - | Irish Mythology | ||
| Neasa | NYAS-a, NAS-a | Irish, Irish Mythology | ||
| Nechtan | - | Irish Mythology, Ancient Celtic | ||
| Ness (1) | NES | Irish Mythology | ||
| Nessa (3) | NES-a | Irish, Irish Mythology | ||
| Niamh | NEEV | Irish, Irish Mythology | ||
| Nuada | - | Irish Mythology | ||
| Nuadha | - | Irish Mythology |