| Name | Meaning | Gender | Origin |
|---|
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Merry | Mirthful: joyous. Also an abbreviation of Meredith.
| Female | English |
| Mia | Mine | Female | Scandinavian |
| Mickey | Abbreviation of Michael and Micah Who is like God?
| Male | English |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Mikey | | Unisex | |
| Miko | | Unisex | |
| Milky | | Female | |
| Millicent | after the character in D.C. Simpson's online comic Ozy and Millie | Female | |
| Millie | English, gentle strength | Female | English |
| Milo | Merciful.
| Male | Latinized |
| Milo | Merciful.
| Male | Latinized |
| Mimi | Form of Williamina
| Female | English |
| Mimi | Form of Williamina
| Female | English |
| Mina | Precious Stone | Female | Hindi |
| Mindy | From Minta - Remembered with love | Female | English |
| Minka | Strong | Male | German |
| Minnow | | Unisex | |
| Miracle | wonder, marvel | Female | Latin |
| Miranda | Admirable
| Female | Latin |
| Miss Kitty | | Unisex | |
| Mister | | Male | |
| Misty | misty.
| Female | English |
| Misty | misty.
| Female | English |
| Mittens | | Unisex | |