| Name | Meaning | Gender | Origin |
|---|
| Juliet | youthful | Female | English |
| June | 6Th Month | Female | English |
| Juno | queen of the heavens | Female | Latin |
| Jupiter | Zeus, Father | Male | Roman |
| Justice | Just, Fairness | Female | English |
| 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 |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Kevin | handsome | Male | Irish |
| Kim | chief | Male | English |
| Kira | Dark Lady.
| Female | Russian |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Laertes | from Shakespeare's Hamlet | Unisex | |
| Lance | knight's attendant; land | Male | English |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Launcelot | Knight of Arthur and lover of Guinevere
| Male | |
| Lazar | God Is My Helper | Unisex | Hungarian |
| Leaf | | Male | |
| Lennox | amid the lems, from the field of elm trees | Male | Scottish |
| Leo | Lion.
| Male | Latin |
| Leona | Like A Lion | Female | French |
| Leonardo | Lion-bold. Leonardo da Vinci is considered by many to be the most brilliant and creative men who ever lived.
| Male | Italian |
| Levi | United | Male | Hebrew |