| Name | Meaning | Gender | Origin |
|---|
| Kenan | Descendant of Cathán | Male | Gaelic |
| Kennedy | Armored head | Male | Gaelic |
| Kenny | Good looking | Male | Gaelic |
| Kermit | Son of the one without envy | Male | Gaelic |
| Kevin | Beautiful at birth | Male | Gaelic |
| Kewpie | | Unisex | Hebrew |
| Kian | Ancient | Male | Gaelic |
| Kieran | Little dark one | Male | Gaelic |
| Killer | | Unisex | Hebrew |
| Killian | War | Male | Gaelic |
| Kishi | Beach, seashore | Unisex | Japanese |
| Kong | Empty, hollow, void | Male | Chinese |
| Kyran | Little dark one | Male | Gaelic |
| Lady | Lady | Unisex | English |
| Laoghaire | Keeper of calves | Male | Gaelic |
| Lincoln | Lake settlement, lake colony | Male | English |
| Loman | Bare | Male | English |
| Lucky | Fortunate | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Mahon | Bear | Male | English |
| Major | Greater | Male | Latin |
| Manley | Common clearing | Male | English |
| Mannix | Little monk | Male | Gaelic |
| Matty | Gift of God | Unisex | Hebrew |
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maxy | Little Maximus | Unisex | Latin |
| Meara | Happy | Male | English |
| Melchior | King city | Male | Persian |
| Melvin | Uncertain, possibly bad town | Male | English |