| Name | Meaning | Gender | Origin |
|---|
| Judd | praised | Male | Medieval |
| Judy | Hebrew, He will be praised, woman from Judea | Female | English |
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| June | 6Th Month | Female | English |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Juniper | Juniper Tree | Female | English |
| Justice | Just, Fairness | Female | English |
| Justin | just, true | Male | Latin |
| Karen | pure | Female | Danish |
| Katie | Variant of Katherine. Pure.
| Female | English |
| Katrina | Greek, pure | Female | |
| Keenan | Ancient
| Male | Irish |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelli | From The Wood | Unisex | Welsh |
| Kelly | Lively: aggressive.
| Female | Irish |
| Ken | Male Barbie Doll. | Male | English |
| Kendall | ruler of the valley | Female | English |
| Kenny | English, born of fire, handsome | Male | English |
| Kentucky | | Unisex | |
| Kerry | dark, dark-haired | Male | Irish |
| Kimberly | Cyneburga's Royal Forest, Meadow | Female | English |
| Kimmy | Cyneburga's Royal Forest, Meadow | Unisex | English |
| Kip | From The Pointed Hill | Unisex | English |
| Kirby | church settlement | Male | Norse |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |