| Name | Meaning | Gender | Origin |
|---|
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jamie | Feminine of James | Female | Scottish |
| Jana | Feminine variation of John | Female | Czech |
| Jasmine | Flower
| Female | Persian |
| Jeannie | English and Scottish, from French variation of Johanna, God is gracious | Female | English |
| Jess | Gift | Male | English |
| Jessica | God's grace | Female | Hebrew |
| Jill | youthful | Female | English |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| Joelle | Jehovah is God
| Female | |
| Jordan | The descending river, to flow | Male | Hebrew |
| Josephine | God will increase | Female | |
| Josie | From Josephine - She shall add. | Female | English |
| Jovi | after Jon Bon Jovi | Unisex | |
| Judy | Hebrew, He will be praised, woman from Judea | Female | English |
| June | 6Th Month | Female | English |
| Juno | queen of the heavens | Female | Latin |
| Justice | Just, Fairness | Female | English |
| Kairi | sea | Female | Japanese |
| Kat | pure | Female | English |
| Kate | Pure | Female | English |
| Katniss | | Female | |
| Katniss | | Female | |
| Katrina | Greek, pure | Female | |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |