| Name | Meaning | Gender | Origin |
|---|
| Hugo | Intelligent
| Male | Latinized |
| Hunny | | Unisex | Hebrew |
| Hyperion | | Unisex | Hebrew |
| Iago | Supplanter
| Male | Welsh |
| Ian | Form of John | Male | Scottish |
| Igloo | Dome shaped Eskimo house made of blocks of snow. | Unisex | |
| Image | | Unisex | Hebrew |
| Izzy | Salvation By God | Male | English |
| Jace | Hebrew, the Lord is salvation | Male | Hebrew |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackson | Son of Jack | Male | English |
| Jafar | little stream | Unisex | |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jason | the Lord is salvation | Male | Hebrew |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jeff | pledge of peace | Male | English |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jiggs | | Unisex | Hebrew |
| Jim | supplanter | Male | English |
| Jimbo | Supplanter, Representative | Unisex | Hebrew |
| Jiminy | | Unisex | Hebrew |