| Name | Meaning | Gender | Origin |
|---|
| Joy | From Joyce - Gay and joyful | Female | Word |
| Jujube | | Unisex | Hebrew |
| Juliette | youthful | Female | |
| June | 6Th Month | Female | English |
| June Bug | | Unisex | Hebrew |
| Juniper | Juniper Tree | Female | English |
| Juno | queen of the heavens | Female | Latin |
| Justine | just, true | Female | |
| Kahlua | | Unisex | |
| Kewpie | | Unisex | Hebrew |
| Kiki | From Enriqueta - Pet | Female | |
| Kiki | From Enriqueta - Pet | Female | |
| Kit Kat | | Unisex | |
| Kit Kat | | Unisex | |
| Kitkat | | Unisex | Hebrew |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kiwi | | Unisex | Hebrew |
| Kona | Dark rich coffee blend from Hawaii. | Unisex | |
| Lacey | Cheerful One | Female | English |
| Lady | A female title of nobility. | Female | |
| Ladybug | | Female | Hebrew |
| Leeloo | after the character in the movie The Fifth Element | Unisex | |
| Lena | Alluring, Temptress, Light | Female | Greek |