| Name | Meaning | Gender | Origin |
|---|
| Jaspers | | Unisex | Hebrew |
| Java | Brewed coffee | Female | Anglicization |
| Java Bean | | Unisex | Hebrew |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jeeves | | Male | Hebrew |
| Jefferson | son of Jeffrey | Male | English |
| Jello | | Unisex | Hebrew |
| Jelly Bean | | Unisex | Hebrew |
| Jenson | son of Jens | Male | Scandinavian |
| Jersey | From A Section Of England | Male | English |
| Jess | Gift | Male | English |
| Jesse James | | Unisex | Hebrew |
| Jester | A fool at medieval courts | Unisex | |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jet Black | | Unisex | |
| Jetty | | Unisex | Hebrew |
| Jezebel | follower of idols | Female | Hebrew |
| Jezzamyn | | Unisex | Hebrew |
| Jiji | from the animated movie Kiki's Delivery Service (Majo no Takkyuubin | Unisex | |
| Jim Crow | | Unisex | Hebrew |
| Jinx | Charm, Spell | Female | Latin |
| Jinxx | | Unisex | Hebrew |
| Jippity Jangles | | Unisex | Hebrew |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |