| Name | Meaning | Gender | Origin |
|---|
| Jackie | supplanter | Female | English |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jaffa | beautiful | Female | Hebrew |
| Jetta | jet | Female | English |
| Jolie | French for pretty | Female | |
| Josey | God Will Increase | Unisex | English |
| Journey | Journey | Female | English |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Juno | queen of the heavens | Female | Latin |
| Justice | Just, Fairness | 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 |
| Kayla | crown of laurels | Female | Arabic |
| Kaz | Box | Unisex | Polish |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |
| Kendall | ruler of the valley | Female | English |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Kennedy | misshapen head | Female | Irish |
| Kiana | Variant of Kian. Ancient.
| Female | Modern |
| Kinsey | victorious prince | Female | English |
| Kip | From The Pointed Hill | Unisex | English |
| Kirsten | christian; stone church | Female | Scandinavian |
| Laurel | Laurel
| Female | Latin |
| Leelee | lily | Female | Short |
| Lexie | Protector Of Mankind | Unisex | English |
| Lister | | Unisex | Hebrew |