| Name | Meaning | Gender | Origin |
|---|
| Lotus | freamlike, lotus flower | Female | Greek |
| Louise | Renowned fighter. Feminine of Louis.
| Female | |
| Low Chroma | after the scientists term for dark-grey wetland soil | Unisex | |
| Lucifer | light-bearer | Male | Latin |
| Lucifer | light-bearer | Male | Latin |
| Lucretia | Riches | Female | Latin |
| Luella | Famous elf
| Female | Spelling |
| Luna | moon | Female | Latin |
| MacKenzie | Child of the wise leader
| Female | Scottish |
| Madeline | woman from Magdala, one who is elevated, a high tower | Female | English |
| Maeve | goddess; a purple flower | Female | Irish |
| Magna | Large | Unisex | Latin |
| Mahogany | American evergreen tree valued for its hard, red-brown wood | Female | Spanish |
| Maia | nurse, mother, goddess of spring; great | Female | Greek |
| Mallory | army counseler, without good fortune | Female | |
| Mara | Sorrowful | Female | Hebrew |
| Maura | Great | Female | Scottish |
| Maureen | Bitter | Female | Irish |
| Maurice | moorish; dark; moor land | Male | Latin |
| Medusa | Guardian | Unisex | Latin |
| Melania | black | Female | Spanish |
| Melanie | Dark.
| Female | Greek |
| Melinda | Blend of Melissa and Linda.
| Female | English |
| Merle | Bright Sea | Male | English |
| Merrick | ruler of the sea | Male | Anglo-Welsh |