| Name | Meaning | Gender | Origin |
|---|
| Logan | Hollow | Unisex | Gaelic |
| London | From London | Male | English |
| Lorrie | Laurel | Unisex | English |
| Maddock | Good | Male | Welsh |
| Maddox | Good | Unisex | Welsh |
| Maitland | From The Meadow | Male | English |
| Malcolm | Columba's servant | Male | Gaelic |
| Manfred | Peaceful strength | Male | Germanic |
| Manley | Common clearing | Male | English |
| Marlon | Little Falcon | Male | English |
| Marshall | Horse servant | Male | Germanic |
| Marvin | Uncertain, possibly eminent marrow | Male | Welsh |
| Mather | Mower | Male | English |
| Mavis | Song thrush | Male | English |
| Melvin | Uncertain, possibly bad town | Male | English |
| Mercer | Vendor of sewing materials | Male | French |
| Meredith | Great lord | Female | Welsh |
| Merlin | Sea fort | Male | Welsh |
| Meryl | Bright as the sea | Unisex | Gaelic |
| Mick | Who is like God? | Male | Hebrew |
| Milady | | Unisex | Hebrew |
| Moira | Uncertain, maybe bitter | Female | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Murdock | Sea | Male | Gaelic |
| Murray | Man of the sea | Male | Gaelic |
| Nanette | Grace | Female | Hebrew |
| Neala | Ruler | Female | Gaelic |
| Neely | Feminine Of Neil Champion. | Unisex | English |
| Neil | Champion | Male | Gaelic |