| Name | Meaning | Gender | Origin |
|---|
| Jessica | God's grace | Female | Hebrew |
| Jimbo | Supplanter, Representative | Unisex | Hebrew |
| Jinx | Charm, Spell | Female | Latin |
| Katherine | Pure. Used since third century A.D. Early Latin forms Katerina and Caterina became Katharine and Catherine. French Cateline and English Catlyn came into wider use during medieval period when variants multiplied.
| Female | Greek |
| Kathyayini | Goddess of Power
| Female | |
| Katy | pure | Female | Short |
| Katy | pure | Female | Short |
| Keirsten | Variant of Kirsten.
| Female | |
| Kelly | Lively: aggressive.
| Female | Irish |
| Keondra | Goddess
| Female | |
| Kesha | | Female | |
| Kiana | Variant of Kian. Ancient.
| Female | Modern |
| Kira | Dark Lady.
| Female | Russian |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Koko And Yumyum | | Unisex | Hebrew |
| Lai Tai | | Unisex | Hebrew |
| Lavender | Lavender, A Purple Flower | Female | English |
| Leia | Weary | Unisex | Hebrew |
| Lenny And Squiggy | | Unisex | Hebrew |
| Lillian | lily, a flower | Female | English |
| Lilly | Lily | Female | English |
| Lobo | Wolf | Unisex | Italian |
| Lollipop | | Unisex | |