| M’Hamed | Maano | Maaren |
| Maarten | Macéo | Maciej |
| Maddox | Mads | Maé |
| Mael | Maël | Maëlan |
| Maëron | Magamed | Magnus |
| Magomed | Mahdi | Mahé |
| Maher | Mahieddine | Mahmoud |
| Mahmut | Maïco | Maik |
| Maikel | Maiko | Maïko |
| Maksim | Maksis | Maksymilian |
| Malcolm | Malcom | Malek |
| Malick | Malik | Mallory |
| Malo | Malon | Malone |
| Malory | Mamadi | Mamadou |
| Mamoudou | Manaël | Manau |
| Manel | Manéo | Mani |
| Mano | Manoa | Manoah |
| Manoé | Manoë | Mansour |
| Mansur | Manu | Manuel |
| Mao | Maoro | Marc |
| Marceau | Marcel | Marcelin |
| Marco | Marcus | Marek |
| Marijn | Marin | Mario |
| Maris | Marius | Mark |
| Marko | Markus | Marlon |
| Marlone | Marnix | Maro |
| Marouan | Marouane | Mart |
| Marten | Martial | Martijn |
| Martin | Marty | Marvin |
| Marwan | Marwane | Massimiliano |
| Massimo | Massin | Matei |
| Mateo | Matéo | Mateus |
| Mateusz | Mathé | Matheo |
| Mathéo | Mathew | Mathias |
| Mathice | Mathies | Mathieu |
| Mathijs | Mathis | Mathisse |
| Mathiz | Mathurin | Mathyas |
| Mathys | Matias | Matice |
| Maties | Matijs | Matis |
| Matiss | Matisse | Matiz |
| Mats | Matt | Matte |
| Matteo | Mattéo | Mattheo |
| Matthéo | Matthew | Matthias |
| Matthieu | Matthijs | Matthis |
| Matthys | Matti | Mattia |
| Mattias | Mattice | Matties |
| Mattijs | Mattis | Mattisse |
| Mattiz | Matto | Matts |
| Matty | Mattys | Matys |
| Matz | Mauri | Maurice |
| Maurits | Mauritz | Mauro |
| Maverick | Mavrick | Max |
| Maxance | Maxandre | Maxence |
| Maxent | Maxim | Maxime |
| Maximiliaan | Maximilian | Maximilien |
| Maximin | Maximus | Maxwell |
| Maxyme | Maylo | Mayron |
| Mazen | Médard | Medard |
| Médéric | Medhi | Medin |
| Mees | Mehdi | Mehdy |
| Mehmed | Mehmet | Mehmetcan |
| Mehran | Melchior | Melek |
| Melih | Melik | Melvil |
| Melvin | Mendel | Mendy |
| Menno | Menzo | Merdan |
| Merijn | Merlijn | Merlin |
| Merlot | Merrick | Mert |
| Mertcan | Mervyn | Metehan |
| Metin | Mica | Micah |
| Michael | Michaël | Michail |
| Michal | Michée | Michel |
| Michele | Michiel | Mick |
| Mickael | Mickaël | Mickel |
| Micky | Midas | Miel |
| Miguel | Mihai | Mik |
| Mika | Mikael | Mikail |
| Mikaïl | Mike | Mikel |
| Mikey | Mikolaj | Mil |
| Milan | Miles | Milio |
| Millan | Mille | Milo |
| Mimoun | Ming | Mingus |
| Minh | Mirac | Miraç |
| Mirco | Mireau | Mirko |
| Miro | Mirsad | Mirza |
| Misha | Mitch | Mitchell |
| Moad | Moïse | Mon |
| Moncef | Monsef | Moon |
| Mordechai | Moreno | Morgan |
| Moritz | Morris | Morten |
| Mory | Moshe | Mostafa |
| Mouad | Mouhamed | Mouhammed |
| Mouhsine | Moulay | Mounib |
| Mounir | Mourad | Moussa |
| Moustapha | Movses | Muammer |
| Mugisha | Mylan | Mylo |
| Myron |