| Name | Meaning | Gender | Origin |
|---|
| Jekyl | | Male | |
| Jenga | | Unisex | Hebrew |
| Jerico | City of the moon. Variant of Hebrew Jericho.
| Male | |
| Jerold | Variant of Gerald Rules by the spear.
| Male | |
| Jerrold | Variant of Gerald Rules by the spear.
| Male | |
| Jitterbug | | Male | Hebrew |
| Johnn | Variant of the Hebrew John Jehovah has been gracious: has shown favor.
| Male | |
| 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 |
| Jumanji | | Unisex | Hebrew |
| Kam | Form of Cameron crooked nose.
| Male | |
| Kandy | Cutie
| Male | |
| Kato | second of twins | Male | African |
| Keifer | Barrelmaker Variation of Cooper. Surname.
| Male | |
| Kenneth Towler | Had O.W.L. breakdown.
| Male | |
| Kingston | From the king's village or estate King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Klondike | | Male | Hebrew |
| Kofi | born on Friday | Male | African |
| Kojak | | Male | Hebrew |
| Kush | son of Rama | Unisex | |
| Kyrk | Church
| Male | |
| Lachie | The boy from the Lochs. Warrior.
| Male | |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Latifa | Pleasant, Gentle | Unisex | Arabic |
| Leon | lion | Male | Greek |