| Name | Meaning | Gender | Origin |
|---|
| Jareth | after Jareth the Goblin King in the movie 'Labyrinth' | Male | Hybrid |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jazz | The romantic music
| Male | Word |
| Jefferson | son of Jeffrey | Male | English |
| Jeremy | God will uplift, appointed by God | Male | English |
| Jeter | after Derek Sanderson Jeter, Yankee's shortstop | Male | |
| Jett | Jet Black Gem | Male | English |
| 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 |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Kinsey | victorious prince | Female | English |
| Kip | From The Pointed Hill | Unisex | English |