| Name | Meaning | Gender | Origin |
|---|
| Jordy | Flow, Descend | Unisex | English |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Julian | Jove's child. Form of Julius and family clan name of several powerful Roman emperors. Biblical Roman centurion Julius saved Paul's life during a hazardous voyage
| Male | English |
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| Jurgen | German form of George
| Male | |
| Kaka | | Unisex | Hebrew |
| Kasey | Vigilant, Watchful | Female | English |
| Kate | Pure | Female | English |
| Kelly | Lively: aggressive.
| Female | Irish |
| Kendall | ruler of the valley | Female | English |
| Kenny | English, born of fire, handsome | Male | English |
| Kevin | handsome | Male | Irish |
| Lauren | bay laurel | Female | English |
| Leslie | dweller in the gray castle; small meadow | Female | Scottish |
| Lilian | lily | Female | English |
| Lillian | lily, a flower | Female | English |
| Lindsay | pool island; linden island | Female | English |
| Lionel | Cousin of Lancelot
| Male | Latin |
| Lorrie | Laurel | Unisex | English |
| Luis | Famous fighter
| Male | |
| Luka | Of Lucania | Unisex | Russian |
| Macbeth | Son of Beth
| Male | |
| Manuel | God is with us | Male | Spanish |
| Marcel | little hammer | Male | |
| Marco | warlike | Male | Italian |