| Name | Meaning | Gender | Origin |
|---|
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Knight | Noble, Soldier | Male | English |
| Koko | stork | Female | Japanese |
| Kujo | | Unisex | |
| Lenny | brave lion | Male | English |
| Leo | Lion.
| Male | Latin |
| Lestat | | Unisex | Hebrew |
| Lexi | Greek, feminine form of Alexander, defending men | Female | English |
| Licorice | Confection made from the licorice root. | Unisex | |
| Lilith | character in Cheers | Female | Assyrian |
| Lola | strong woman | Female | Spanish |
| Lucifer | light-bearer | Male | Latin |
| Lucifer | light-bearer | Male | Latin |
| Lucky | Having good luck. | Male | Word |
| Lucy | light: illumination.
| Female | English |
| Luigi | Famous fighter
| Male | Italian |
| Lulu | Pet form of the names Louise or Louella.
| Female | English |
| Luna | moon | Female | Latin |
| Lyric | lyre | Female | Greek |
| Mabel | my fair maid; lovely | Female | English |
| Maggie | Abbreviation of Margaret. A pearl.
| Female | English |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Magpie | | Unisex | |