| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 721 | Muireach | Gaelic | Moorish. | M | |
| 722 | Muireall | Gaelic | Bitter. | F | |
| 723 | Mungan | Gaelic | Gaelic form of Mungo. | M | |
| 724 | Mungo | Gaelic | Amiable; beloved. | M | |
| 725 | Murchadh | Gaelic | Protector of the sea. | M | |
| 726 | Murdoch | Gaelic | Mariner. | M | |
| 727 | Murthuile | Gaelic | Sea tide. | M | |
| 728 | Myrna | Gaelic | Variant of Morna: Beloved. | F | |
| 729 | Nara | Gaelic | Happy. | F | |
| 730 | Neacal | Gaelic | People's victory. | M | |
| 731 | Neall | Gaelic | Champion. | M | |
| 732 | Neelie | Gaelic | Feminine of Neil: champion. | F | |
| 733 | Neely | Gaelic | Feminine of Neil: champion. | F | |
| 734 | Neil | Gaelic | Champion. | M | |
| 735 | Neila | Gaelic | Feminine of Neil: champion. | F | |
| 736 | Nels | Gaelic | Son of Neil. | M | |
| 737 | Nelson | Gaelic | Son of Neil. | M | |
| 738 | Nevin | Gaelic | Worships the saints. | M | |
| 739 | Nevins | Gaelic | Worships the saints. | M | |
| 740 | Nevyn | Gaelic | Worships the saints. | M | |