| Name | Meaning | Gender | Origin |
|---|
| Lucas | Man from Lucania | Male | Greek |
| Lucie | Light | Female | Latin |
| Lucien | Light | Male | Latin |
| Lucky | Fortunate | Unisex | English |
| Luigi | Fame + war | Male | Germanic |
| Major | Greater | Male | Latin |
| Manon | Bitter | Female | Hebrew |
| Manu | Second born | Male | African |
| Mara | Bitter | Female | Hebrew |
| Marcel | Little Marcus | Male | Latin |
| Margarita | Pearl | Female | Greek |
| Mariette | Uncertain, maybe bitter | Female | Hebrew |
| Marius | From the god Mars | Male | Latin |
| Marquis | Lord of the marches | Male | French |
| Marquise | Lady of the marches | Male | French |
| Mathilda | Powerful battler | Female | Germanic |
| Matteo | Gift of God | Male | Hebrew |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Meeko | | Unisex | Hebrew |
| Melissa | Honey-bee | Female | Greek |
| Melodie | Melody | Female | English |
| Merle | Contracted form of Meriel | Female | English |
| Merlin | Sea fort | Male | Welsh |
| Mignon | Cute | Female | French |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Mina | Will, desire + helmet, protection | Female | Germanic |
| Mini | Something smaller than others of its type | Unisex | English |
| Mirabel | Lovely | Female | Latin |
| Mirabelle | Lovely | Female | Latin |
| Mirielle | Uncertain, possibly admire | Female | Latin |