| Name | Meaning | Gender | Origin |
|---|
| Josie | From Josephine - She shall add. | Female | English |
| Journey | Journey | Female | English |
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| Juniper | Juniper Tree | Female | English |
| Justice | Just, Fairness | Female | English |
| Justin | just, true | Male | Latin |
| Katie | Variant of Katherine. Pure.
| Female | English |
| Keenan | Ancient
| Male | Irish |
| Kelly | Lively: aggressive.
| Female | Irish |
| Ken | Male Barbie Doll. | Male | English |
| Kendall | ruler of the valley | Female | English |
| Kimberly | Cyneburga's Royal Forest, Meadow | Female | English |
| Kimmy | Cyneburga's Royal Forest, Meadow | Unisex | English |
| Kirby | church settlement | Male | Norse |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Lance | knight's attendant; land | Male | English |
| Lane | narrow road | Male | English |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Laura | bay laurel | Female | Latin |
| Lauren | bay laurel | Female | English |
| Lawson | son of Lawrence | Male | English |
| Leah | cow, weary one; glad tidings; mistress, ruler | Female | Hebrew |