| Name | Meaning | Gender | Origin |
|---|
| Ivy | ivy plant, a wine | Female | Plant |
| Izzy | Salvation By God | Male | English |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackie | supplanter | Female | English |
| Jackson | Son of Jack | Male | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jager | Carter | Unisex | English |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| 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 |
| Jazz | The romantic music
| Male | Word |
| Jazzy | Modern variant of Jasmine: combination of Jocelyn and the musical term jazz.
| Female | |
| Jelly Bean | | Unisex | Hebrew |
| Jellybean | | Unisex | Hebrew |
| Jenna | white shadow, white wave | Female | English |
| Jerry | after Jerry Garcia, The Grateful Dead | Male | English |
| Jesse | wealthy | Male | Hebrew |
| Jezebel | follower of idols | Female | Hebrew |
| Jiggles | | Unisex | Hebrew |
| Jinx | Charm, Spell | Female | Latin |