| Name | Meaning | Gender | Origin |
|---|
| Killian | War | Male | Gaelic |
| King | King's forest clearing | Male | English |
| Kirby | Church settlement | Female | Norse |
| Knox | Round-topped hill | Male | English |
| Kourtney | From Courtenay | Unisex | English |
| Lachlan | Warrior from the Land of the Lochs | Unisex | Gaelic |
| Laila | Dark beauty | Female | Arabic |
| Laken | From The Lake | Unisex | Celtic |
| Landen | Long hill | Unisex | English |
| Landon | Long hill | Male | English |
| Lark | Bird | Female | English |
| Lawson | Man from Laurentum | Male | Latin |
| Layton | Water-course settlement, leek settlement | Male | English |
| Leah | Weary | Female | Hebrew |
| Leander | Lion Man | Male | Greek |
| Leia | Weary | Female | Hebrew |
| Leilani | Heavenly blossoms | Male | Hawaiian |
| Leland | Land lying fallow | Male | English |
| Leo | Lion | Male | Latin |
| Levi | Combined | Male | Hebrew |
| Lexi | Defending men | Female | Greek |
| Lexie | Defending men | Female | Greek |
| Lia | Uncertain, possibly from Rosalia | Female | Italian |
| Liam | Will, desire and helmet, protection | Male | Germanic |
| Liberty | Freedom | Female | Latin |
| Liliana | Lilies | Female | Latin |
| Lilianna | Lilies | Female | Latin |
| Lillian | My God is a vow | Female | Hebrew |
| Lilliana | Lilies | Female | Latin |
| Lily | Lily | Female | English |