| Name | Meaning | Gender | Origin |
|---|
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jay | jaybird | Male | Latin |
| Jazz | The romantic music
| Male | Word |
| Jean | God is gracious | Male | |
| Jello | | Unisex | Hebrew |
| Jelly-Belly | | Unisex | Hebrew |
| Jenga | | Unisex | Hebrew |
| Jerry | after Jerry Garcia, The Grateful Dead | Male | English |
| Jess | Gift | Male | English |
| Jesse | wealthy | Male | Hebrew |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| Joker | | Male | Hebrew |
| Jordan | The descending river, to flow | Male | Hebrew |
| Joseph | God will increase | Male | Hebrew |
| Josh | God Saves | Unisex | English |
| Jules | youthful; soft, downy | Male | |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Jupiter | Zeus, Father | Male | Roman |
| Jynx | Charm, Spell | Unisex | Latin |
| Kahlua | | Unisex | |