| Name | Meaning | Gender | Origin |
|---|
| Kachina | Sacred Dancer | Unisex | Native American |
| Kalea | bright | Unisex | |
| Kali | after the Indian goddess of death | Female | Sanskrit |
| Karnak | | Unisex | Hebrew |
| Katia | pure | Female | Russian |
| Keene | Ancient.
| Male | |
| Kegan | A thinker: fiery. Form of Hugh.
| Male | |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Kimi | righteous | Female | Japanese |
| Kirstin | Variant of Kristen. Follower of Christ.
| Female | |
| Kisa | Russian for kitty | Unisex | |
| Kisha | Hebrew, cassia tree | Female | Spelling |
| Kronos | | Unisex | Hebrew |
| Krystal | Crystal, Ice | Unisex | Greek |
| Lachlan | From the land of lakes.
| Male | Scottish |
| Lars | after the Metallica drummer Lars Ulrich | Male | Scandinavian |
| Lazarus | God's help | Male | Greek |
| Leif | heir, descendant | Male | Scandinavian |
| Lena | Alluring, Temptress, Light | Female | Greek |
| Lilith | character in Cheers | Female | Assyrian |
| London | fierce ruler of the world | Female | English |
| Lorna | of Lorne | Female | English |
| Lucia | Light | Female | Italian |
| Lucinda | light | Female | English |
| Lucretia | Riches | Female | Latin |