| Name | Meaning | Gender | Origin |
|---|
| Jayda | Green Gemstone | Unisex | English |
| Jemma | Italian, precious stone | Female | Spelling |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jethro | excellence | Male | Hebrew |
| Jett | Jet Black Gem | Male | English |
| Jetta | jet | Female | English |
| Jewel | Jewel
| Female | Word |
| Jing | Pure Epitomy | Unisex | Chinese |
| Joaquin | Abbreviation of the Hebrew name Jehoichin meaning Jehovah has established. Joaquin Miller the colorful 19th century poet-adventurer of the American west.
| Male | Spanish |
| Joellen | Jehovah is God. Feminine of Joel.
| Female | |
| Jordan | The descending river, to flow | Male | Hebrew |
| Jorie | God will uplift
| Female | English |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Kaya | my elder sister | Female | Native |
| Keiko | Japanese for happy or beloved | Female | Japanese |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Krystal | Crystal, Ice | Unisex | Greek |
| Lana | Attractive | Female | English |
| Langston | Town Of The Giant | Male | English |
| Lapis | Jewel | Female | Egyptian |
| Larisa | Citadel | Female | Russian |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Leif | heir, descendant | Male | Scandinavian |
| Lilac | Bluish Purple | Female | Latin |
| Ling | Chime | Unisex | Chinese |