| Name | Meaning | Gender | Origin |
|---|
| Lou | Fame and war | Male | Germanic |
| Louie | Fame and war | Male | Germanic |
| Lucia | Light | Female | Latin |
| Luke | Man from Lucania | Male | Greek |
| Lyndsey | Lincoln island | Unisex | English |
| Lynx | Keepers of the secrets of the forests in mythology, also the name of a constellation in the Northern Hemisphere's sky | Both | English |
| Malinda | Blending of 'mel' and 'inda' | Female | English |
| Marcela | Little Marcus | Female | Latin |
| Marge | Pearl | Female | Greek |
| Mariana | Latinate form of Marian | Female | Latin |
| Marilee | Combination of Mary and Lee | Female | English |
| Marion | Uncertain, maybe bitter | Female | Hebrew |
| Marjorie | Pearl | Female | Greek |
| Marta | Lady | Female | Aramaic |
| Martine | From the god Mars | Female | Latin |
| Maryann | Uncertain, maybe bitter | Female | Hebrew |
| Maymay | | Unisex | Hebrew |
| Mellisa | Honey-bee | Unisex | Greek |
| Melvina | Smooth brow | Female | Gaelic |
| Mesha | Given life during the lunar month of aries | Female | Indian |
| Minerva | Mind | Female | Latin |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Miss | | Unisex | Hebrew |
| Miyoko | Beautiful generation child | Female | Japanese |
| Monster | A creature of frightening appearance | Unisex | English |
| Moon | Letters | Female | Korean |
| Murphy | Sea warrior | Male | Gaelic |
| Namiko | Wave child | Female | Japanese |
| Naomi | Beautiful, pleasant, delightful | Female | Hebrew |
| Netta | Gracious | Female | English |