| Mabo | Mabolo | Macbeth | Macho | Machos |
| Macintosh | Madison | Madito | Manto | Magelan |
| Magic | Mahoni | Mahonil | Mailo | Mailor |
| Major | Malcolm | Male | Malte | Malto |
| Mambo | Mambor | Mamby | Mano | Manolos |
| Manoy | Manto | Mantos | Manü | Manyo |
| Marc | Marco | Marlon | Maro | Maron |
| Marlin | Mäxel | Malouk | Marouk | Magnus |
| Mars | Marshal | Mash | Masho | Mashom |
| Mask | Masko | Matt | Matto | Matzinger |
| Maurice | Maverick | Max | Maxim | Maximo |
| Marvin | Mani | Mayon | Manja | Magnum |
| Maximus | Maxwell | Maier | Mayday | Mayer |
| Mc Fly | McKennsy | Meiki | Melac | Menni |
| Mentor | Mephisto | Mercutio | Merlin | |
| Meiko | Manito | Magan | Miguel | |
| Merlo | Mexx | Mica | Michiko | Micky |
| Mico | Mikis | Mikosch | Milan | Milano |
| Milo | Mingo | Mirco | Miro | Mischka |
| Mike | Mischa | Mitch | Mirlo | Mikel |
| Midge | Midga | Midgo | Mischu | Momo |
| Mochito | Mogli | Molli | Monty | Moon |
| Morgan | Morientes | Moonlight | Mozart | Mohjo |
| Moony | Mordio | Moritz | Morris | Mortimer |
| Mogwai | Moody | Monka | Moro | |
| Muck | Muffel | Muffin | Murli | Murphy |
| Mylo | Myckos | Mulan | Mungo | Mylo |