| Name | Meaning | Gender | Origin |
|---|
| Jana | Feminine variation of John | Female | Czech |
| Jasmine | Flower
| Female | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jemima | dove | Female | Hebrew |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jessica | God's grace | Female | Hebrew |
| Jewel | Jewel
| Female | Word |
| Jillian | Jove's child. Variant of Gillian from the masculine Julian.
| Female | Phonetic |
| Jodie | From Judith - Admired and praised | Unisex | |
| Jolie | French for pretty | Female | |
| Jordan | The descending river, to flow | Male | Hebrew |
| Josephine | God will increase | Female | |
| Joshua | God is salvation
| Male | Hebrew |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Judy | Hebrew, He will be praised, woman from Judea | Female | English |
| Jules | youthful; soft, downy | Male | |
| Juno | queen of the heavens | Female | Latin |
| Justin | just, true | Male | Latin |
| Justine | just, true | Female | |
| Kai | Fire
| Male | Hawaiian |
| Kalina | Flower
| Female | |