| Name | Meaning | Gender | Origin |
|---|
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jazz | The romantic music
| Male | Word |
| Jellybean | | Unisex | Hebrew |
| Jenson | son of Jens | Male | Scandinavian |
| Jeronimo | Spanish form of Jerome saved
| Male | |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jezzamyn | | Unisex | Hebrew |
| Jillie | Downy Haired | Unisex | English |
| Joaquin | Abbreviation of the Hebrew name Jehoichin meaning Jehovah has established. Joaquin Miller the colorful 19th century poet-adventurer of the American west.
| Male | Spanish |
| Johnny Rotten | | Unisex | Hebrew |
| Johnston | From John's farm
| Male | |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Jonathan | God gives | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Junky | Messy, related to junk. Meaningless junk. | Male | |
| Jupiter | Zeus, Father | Male | Roman |
| Jurgen | German form of George
| Male | |
| Justin | just, true | Male | Latin |
| Kabuki | Type Of Drama | Male | Japanese |
| Kactus | | Male | Hebrew |
| Kadangnga | | Unisex | Hebrew |
| Kaew | | Unisex | Hebrew |
| Kahlil | after Lebanese writer Kahlil Gibran | Male | Arabic |
| Kahlua | | Unisex | |
| Kai | Fire
| Male | Hawaiian |