| Name | Meaning | Gender | Origin |
|---|
| Kermit | Son of the one without envy | Male | Gaelic |
| King | King's forest clearing | Male | English |
| Kitty | Pure | Female | Greek |
| Lacey | Lacy | Female | English |
| Lady | Lady | Unisex | English |
| Levi | Combined | Male | Hebrew |
| Lilly | Lily | Female | English |
| Louie | Fame and war | Male | Germanic |
| Louis | Fame and war | Male | Germanic |
| Louisa | Fame and war | Female | Germanic |
| Lucille | Light | Female | Latin |
| Lucky | Fortunate | Unisex | English |
| Lucy | Light | Female | Latin |
| Luna | Moon | Female | Latin |
| Maddy | Pet form of Mad- names | Female | English |
| Maggie | Pearl | Female | Greek |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Malcolm | Columba's servant | Male | Gaelic |
| Marvin | Uncertain, possibly eminent marrow | Male | Welsh |
| Matilda | Powerful battler | Female | Germanic |
| Matt | Gift of God | Male | Hebrew |
| Max | Little Maximus | Male | Latin |
| May | The fifth month of the year | Female | English |
| Megan | Pearl | Female | Greek |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Mickey | Who is like God? | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Mister | | Unisex | Hebrew |