| 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 |
| Kaya | my elder sister | Female | Native |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kel | | Unisex | Hebrew |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |
| Ken | Male Barbie Doll. | Male | English |
| Kenan | possession | Unisex | |
| Kevin | handsome | Male | Irish |
| Kim | chief | Male | English |
| Klara | Clear, Bright | Unisex | Scandinavian |
| Kristen | Anointed, Follower Of Christ | Female | Danish |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Kym | Royal Meadow | Unisex | English |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Lars | after the Metallica drummer Lars Ulrich | Male | Scandinavian |
| Laura | bay laurel | Female | Latin |
| Laurel | Laurel
| Female | Latin |
| Lauren | bay laurel | Female | English |
| Lea | weary or meadow | Female | English |
| Lee | Healer
| Male | English |
| Leif | heir, descendant | Male | Scandinavian |
| Leigh | meadow | Female | English |
| Lena | Alluring, Temptress, Light | Female | Greek |
| Lennon | small cloak or cape | Male | Irish |