| Name | Meaning | Gender | Origin |
|---|
| Lady | Lady | Unisex | English |
| Leticia | Joy | Female | Latin |
| Lil | Lily | Unisex | English |
| Lilia | Lilies | Female | Latin |
| Liliana | Lilies | Female | Latin |
| Lily | Lily | Female | English |
| Lincoln | Lake settlement, lake colony | Male | English |
| Lobo | Wolf | Male | Spanish |
| Lola | Sorrows | Female | Spanish |
| Lou | Fame and war | Male | Germanic |
| Lucky | Fortunate | Unisex | English |
| Lucy | Light | Female | Latin |
| Maddy | Pet form of Mad- names | Female | English |
| Maggie | Pearl | Female | Greek |
| Magnum | A large type of wine bottle. | Unisex | English |
| Mako | Child of truth | Unisex | Japanese |
| Manley | Common clearing | Male | English |
| Marco | From the god Mars | Male | Latin |
| Maria | Bitter | Female | Hebrew |
| Maricruz | Mary of the Cross | Female | Spanish |
| Marilu | | Female | Hebrew |
| Marmaduke | Devotee of Maedoc | Male | Gaelic |
| Marvel | Miracle | Unisex | English |
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Mini | Something smaller than others of its type | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Miranda | She who must be admired | Female | Latin |