| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 701 | Martainn | Gaelic | Warlike. | M | |
| 702 | Maspann Bhaillidh | Gaelic | Son of the steward. | M | |
| 703 | Mayo | Gaelic | Lives near the yew trees. | M | |
| 704 | Meegan | Gaelic | Soft; gentle. | F | |
| 705 | Melvina | Gaelic | Variant of Malvina: Smooth brow. | F | |
| 706 | Micheal | Gaelic | Form of Michael 'Who is like God?'. | M | |
| 707 | Micheil | Gaelic | Gaelic form of Michael. | M | |
| 708 | Mildread | Gaelic | Gaelic form of Mildred. | F | |
| 709 | Min | Gaelic | Smooth; fine; small. | F | |
| 710 | Moibeal | Gaelic | Gaelic form of Mabel. | F | |
| 711 | Monroe | Gaelic | From the red swamp. | M | |
| 712 | Mor | Gaelic | Bitter. | F | |
| 713 | Morag | Gaelic | Great; sun. | F | |
| 714 | Morfinn | Gaelic | Pale. | M | |
| 715 | Morna | Gaelic | Beloved. | F | |
| 716 | Morvan | Gaelic | Pale. | M | |
| 717 | Morven | Gaelic | Pale. | M | |
| 718 | Morvin | Gaelic | Pale. | M | |
| 719 | Morvyn | Gaelic | Pale. | M | |
| 720 | Muadhnait | Gaelic | Noble. | F | |