| Macho | Spanish name meaning 'strong' or 'masculine'. |
| Maciek | Polish diminutive form of Maciej, meaning 'twisted' or 'wrestled'. |
| Mackie | Son of the fireborn one. |
| Macky | Diminutive form of Mackenzie, meaning 'wise' or 'wise child'. |
| Magdaleno | Spanish name meaning 'of Magdala', a town in ancient Israel. |
| Magnum | Latin name meaning 'great' or 'large'. |
| Maico | Short form of Maicon, meaning 'strong' or 'masculine'. |
| Maicon | Portuguese name meaning 'strong' or 'masculine'. |
| Majik | Uncommon name meaning 'magic' or 'mystical'. |
| Makai | Who is like God |
| Makell | One who is like God |
| Mancel | A person from the city of Mans. |
| Mandawuy | Aboriginal Australian name meaning 'strong' or 'powerful'. |
| Mandela | One who is a commander. |
| Mando | A short form of Armando. |
| Manrico | powerful leader |
| Manthos | Greek name meaning 'gift of God' or 'blessed'. |
| Marcanthony | Marc Plus Anthony |
| Marcelis | Latin name meaning 'young warrior' or 'youthful fighter'. |
| Marcellous | Latin name meaning 'young warrior' or 'youthful fighter'. |
| Margarito | A precious pearl of light. |
| Markelle | Variant of Markell, meaning 'warrior' or 'soldier'. |
| Marl | Soil rich in lime deposits. |
| Marshawn | Mark Plus Shawn |
| Marson | English name meaning 'son of Mars', the Roman god of war. |
| Marvic | Filipino name meaning 'strong' or 'masculine'. |
| Mattew | Gift of Yahweh or God |
| Matthaeus | Derived from gift of the Lord. |
| Matthaios | Greek form of gift of the Lord. |
| Mattia | Italian name meaning gift of God. |
| Matunaaga | A name meaning one who is gifted. |
| Maurico | Spanish name meaning 'dark' or 'moorish'. |
| Maxton | Strong and powerful, derived from Maximus |
| Mayen | Derived from May, symbolizing love and beauty |
| Mcgregor | Son of the fierce, valiant man. |
| McHenry | Son of the ruler of the house. |
| Mecca | One who is like Yahweh or God |
| Med | Short form of names ending in -med, meaning protector |
| Meek | Showing humility and gentleness |
| Meindert | Derived from Meinhard, meaning strong and brave |