| Name | Meaning | Gender | Origin |
|---|
| Mattie | Mighty In Battle | Unisex | German |
| Matty | Gift Of G-D | Unisex | Hebrew |
| Maud | strength in battle | Female | English |
| Maude | battle-mighty | Female | English |
| Maverick | One that dissents from the group. | Male | American |
| Max | Large spring | Male | English |
| Max | Large spring | Male | English |
| Maximilian | greatest | Male | Latin |
| Maximus | greatest | Male | Latin |
| Maxwell | Capable
| Male | Scottish |
| Maynard | Firm
| Male | |
| Medwin | Strong Friend | Unisex | English |
| Megan | mighty, strong able, pearl | Female | English |
| Melvin | Chief
| Male | English |
| Merrick | ruler of the sea | Male | Anglo-Welsh |
| Michael | who is like God | Male | Hebrew |
| Miko | | Unisex | |
| Millicent | after the character in D.C. Simpson's online comic Ozy and Millie | Female | |
| Minerva | after the Roman goddess of the hunt | Female | Latin |
| Minka | Strong | Male | German |
| Miriam | bitter | Female | Hebrew |
| Mitchell | who is like God | Male | English |
| Montgomery | mountain hunter | Male | |
| Morgan | circle; sea | Female | Welsh |
| Moses | saved; child; taken from water | Male | Egyptian |