| Malohaut | Old English name, means 'strong and mighty' |
| Manassen | Derived from Old English, means 'strong and powerful' |
| Manawyd | Derived from Welsh, means 'blessed' or 'fortunate' |
| Mandee | One who is Much Loved |
| Maneaser | Old English, means 'one who causes trouble' |
| Maneser | Old English, means 'one who causes trouble' |
| Manleich | Hebrew, means 'who is like God?' |
| Manlie | One who is strong and manly. |
| Manser | Old English, means 'one who causes trouble' |
| Mansige | Old English, means 'one who causes trouble' |
| Mantun | A name meaning man of the town. |
| Maqitreni | Arabic, means 'one who is strong and powerful' |
| Marant | French, means 'warrior' or 'soldier' |
| Maranz | French, means 'warrior' or 'soldier' |
| Marboart | Old English, means 'bright fame' or 'illustrious' |
| Maredudd | Great lord of the sea people. |
| Marganor | Old English, means 'pearl ruler' or 'jewel lord' |
| Margetud | Old English, means 'pearl treasure' |
| Margiteut | Old English, means 'pearl ruler' |
| Margondes | Old English, means 'pearl gift' |
| Marhalt | Old English, means 'bright fame' or 'illustrious' |
| Marhaus | Old English, means 'bright house' or 'illustrious home' |
| Marquess | A noble rank of high status. |
| Martans | Old English, means 'warrior' or 'soldier' |
| Martini | Italian, means 'of Mars' or 'warlike' |
| Marvis | Friend of the Sea |
| Maslorius | Latin, means 'great lord' or 'noble ruler' |
| Masuo | Japanese, means 'masculine' or 'strong' |
| Matauc | A name meaning wise counselor. |
| Matharr | One who is a strong warrior. |
| Mathye | A gift from the divine spirit. |
| Matto | A name meaning brave and bold. |
| Matuc | One who is a faithful friend. |
| Matugenus | Born of a good mother or kin. |
| Mauduit | An illmannered or badly bred man. |
| Mauger | A powerful and mighty spear ruler. |
| Mavoheni | Great warrior or noble warrior |
| Mayew | Great lord or noble lord |
| Maykn | Great battle or great war |
| Meapa | Battle lord or lord of battle |