| Name | Meaning | Gender | Origin |
|---|
| Leslie | dweller in the gray castle; small meadow | Female | Scottish |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |
| Libby | Diminutive of Elizabeth.
| Female | English |
| Lily | Lily
| Female | English |
| Lindsay | pool island; linden island | Female | English |
| Livingstone | From Livingston
| Male | |
| Logan | little hollow | Male | Scottish |
| Lorna | of Lorne | Female | English |
| Lyle | island | Male | Scottish |
| Mac | Son of
| Male | Scottish |
| Macadam | | Unisex | |
| Macbeth | Son of Beth
| Male | |
| Macintosh | Son of the thane
| Male | |
| Maggie | Abbreviation of Margaret. A pearl.
| Female | English |
| Maisie | child of light | Female | Scottish |
| Malcolm | Royal Blood | Male | Scottish |
| Marcus | warlike | Male | Latin |
| Margo | Pearl | Female | English |
| May | bitter | Female | English |
| McKenzie | Handsome, Fiery | Unisex | English |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Montgomery | mountain hunter | Male | |
| Mungo | my pet | Male | Scottish |
| Murdock | victorious at sea | Unisex | |