| Name | Meaning | Gender | Origin |
|---|
| Jane | gracious, merciful, God is gracious | Female | English |
| Jaws | Bones that form the mouth. A dangerous situation - "The Jaws of Death" | Unisex | |
| Jeep | | Unisex | Hebrew |
| Jen | White, Fair | Unisex | English |
| Jill | youthful | Female | English |
| Jinx | Charm, Spell | Female | Latin |
| Jo | Variation of Johanna, God is gracious | Female | English |
| Josh | God Saves | Unisex | English |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Joyce | after James Augustine Aloysius Joyce, Irish writer and poet | Female | Latin |
| Juice | | Unisex | Hebrew |
| June | 6Th Month | Female | English |
| Kate | Pure | Female | English |
| Kayle | | Unisex | Hebrew |
| Kes | | Unisex | Hebrew |
| Khan | An Indian ruler or official | Unisex | |
| Kid | | Unisex | Hebrew |
| Kip | From The Pointed Hill | Unisex | English |
| Kiss | | Unisex | Hebrew |
| Kronk | | Unisex | Hebrew |
| Lad | Teaches | Unisex | Anglo-Saxon |
| Lara | citadel | Female | Russian |
| Leigh | meadow | Female | English |
| Lil | English from Latin, lily, a flower | Female | English |
| Lil | English from Latin, lily, a flower | Female | English |