| Name | Meaning | Gender | Origin |
|---|
| Jill | youthful | Female | English |
| Jolie | French for pretty | Female | |
| Josee | God Will Increase | Unisex | French |
| Josephine | God will increase | Female | |
| Josette | Jehovah increases | Female | |
| Julia | Youthful
| Female | Latin |
| Juliet | youthful | Female | English |
| Juliette | youthful | Female | |
| June | 6Th Month | Female | English |
| Kalara | Clear, Bright | Unisex | Latin |
| Kalila | beloved | Female | Arabic |
| Kassandra | Shining On Mankind | Unisex | Greek |
| Kate | Pure | Female | English |
| 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 |
| Katja | Pure.
| Female | |
| Kaya | my elder sister | Female | Native |
| Kayla | crown of laurels | Female | Arabic |
| Kimberly | Cyneburga's Royal Forest, Meadow | Female | English |
| Kiri | tree bark | Female | Maori |
| Lavender | Lavender, A Purple Flower | Female | English |
| Layla | night | Female | Arabic |
| Layla | night | Female | Arabic |
| Levi | United | Male | Hebrew |
| Lexi | Greek, feminine form of Alexander, defending men | Female | English |
| Libby | Diminutive of Elizabeth.
| Female | English |