| Name | Meaning | Gender | Origin |
|---|
| Julia | Youthful
| Female | Latin |
| Juniper | Juniper Tree | Female | English |
| Kade | From the wetlands.
| Male | Spelling |
| Kandy | Cutie
| Male | |
| Kanji | | Male | Hebrew |
| Kasiyah | | Female | |
| Katrina | Greek, pure | Female | |
| Keeki | | 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 |
| Kiana | Variant of Kian. Ancient.
| Female | Modern |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Kisses | One who likes to kiss | Male | |
| Klondike | | Male | Hebrew |
| Koko And Yumyum | | Unisex | Hebrew |
| Kringle | | Unisex | |
| Lachie | The boy from the Lochs. Warrior.
| Male | |
| Laine | From the long meadow
| Male | |
| Laser | | Male | Hebrew |
| Lavender Brown | Gryffindor student.
| Female | |
| Lee Jordan | Gryffindor student.
| Male | |
| Lexus | English variation of Alexios, defending men | Male | Greek |
| Lia | dependence | Female | Italian |
| Liberty | Free
| Female | Word |
| Licorice Drop | | Unisex | |