| Name | Meaning | Gender | Origin |
|---|
| Knuckles | | Male | Hebrew |
| Kojak | | Male | Hebrew |
| Konecko | | Unisex | |
| Koshka | Russian for kitten | Unisex | |
| Lacy | Derived from Lacey which is a French Nobleman's surname brought to British Isles after Norman conquest.
| Male | |
| Lady Blue | | Unisex | Hebrew |
| Lady Godiva | | Unisex | Hebrew |
| Lai Tai | | Unisex | Hebrew |
| Laleh | Tulip | Unisex | Persian |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Langley | Residence Name | Male | English |
| Lanie | | Unisex | |
| Laser | | Male | Hebrew |
| Lasher | | Male | Hebrew |
| Lassie | Girl
| Female | |
| Latte | Expresso coffee mixed with steamed milk - a caf latte. | Male | |
| Lavoie | | Unisex | |
| Lee | Healer
| Male | English |
| Lelia | Greek, sweet-speaking | Female | Contraction |
| Leo | Lion.
| Male | Latin |
| Leonardo | Lion-bold. Leonardo da Vinci is considered by many to be the most brilliant and creative men who ever lived.
| Male | Italian |
| Leopold | after Leopoldo in the movie Blood and Roses | Male | |
| Liam | Form of William.
| Male | Irish |
| Licorice | Confection made from the licorice root. | Unisex | |
| Lightweight | | Male | |