| Name | Meaning | Gender | Origin |
|---|
| 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 |
| Kathleen | Innocent
| Female | Anglicized |
| Kathren | Pure, Chaste | Unisex | Not Available |
| Katia | pure | Female | Russian |
| Katie | Variant of Katherine. Pure.
| Female | English |
| Katina | Pure, Unsullied | Unisex | Greek |
| Katinka | after the character in the movie Zoolander | Unisex | |
| Katja | Pure.
| Female | |
| Kato | second of twins | Male | African |
| Katrina | Greek, pure | Female | |
| Kattie | pure | Female | Short |
| Kattrina | Pure.
| Female | |
| Katy | pure | Female | Short |
| Katy | pure | Female | Short |
| Katya | pure | Female | Russian |
| Kaya | my elder sister | Female | Native |
| Kayla | crown of laurels | Female | Arabic |
| Kaylee | Arabic and Hebrew, laurel, crown | Female | American |
| Kayleigh | Slender | Unisex | English |
| Kaylen | Variant Of Kay And Kayla. Keeper Of The Keys; Pure. | Unisex | English |
| Keke | | Unisex | |
| Khara | Pure, chaste | Unisex | English |
| Kiska | pure | Unisex | |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |