| Mab Mabbina Macha Mada Madailein Maeve Maible Maighdlin Maille Mailsi Maire Mairead Mairia Mairona Maiti Maitilda Maitilde Maive Majella Malvina Maola Maoli Marella Margaret Marilla Maud Maude Maura Maureen Maurine | |
| | Maurya Mayra Meadhbh Mearr Meeda Megdn Meghan Melva Merna Moina Moira Moire Molli Mollie Mona Monca Moreen Morella Morgayne Morna Morrin Moya Moyna Muadhnait Muireann Muirgheal Muirne Murel Muriel Myma | |
| | Madden Maeleachlainn Maelisa Maille Mainchin Mal Malachy Malvin Mane Mannix Mannuss Manus Maolruadhan Maonaigh Marcas Matthew Maughold Mccoy Meade Meadhra Meara Melrone Melvin Melvyn Michael | |
| | Micheal Mick Mickey Miles Mitch Mitchel Mitchell Mogue Molan Molli Morain Moran Morgan Moriarty Morrissey Muircheartaigh Muireadhach Mukonry Mulcahy Mundy Murchadh Murray Murry Murtaugh Myles | |
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