| Name | Meaning | Gender | Origin |
|---|
| Icy | | Unisex | Hebrew |
| Indigo | A dark blue plant dye | Female | Greek |
| Inferno | | Unisex | Hebrew |
| Isis | throne | Female | Egyptian |
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Jackie | supplanter | Female | English |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jag | The Universe | Unisex | Hindu |
| Jager | Carter | Unisex | English |
| Jaguar | Large Spotted Feline | Male | English |
| James Dean | | Unisex | Hebrew |
| Jasmine | Flower
| Female | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jaws | Bones that form the mouth. A dangerous situation - "The Jaws of Death" | Unisex | |
| Jazz | The romantic music
| Male | Word |
| Jett | Jet Black Gem | Male | English |
| Jimbo | Supplanter, Representative | Unisex | Hebrew |
| Jinx | Charm, Spell | Female | Latin |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| Journey | Journey | Female | English |
| Juliette | youthful | Female | |
| Kahlua | | Unisex | |