| Name | Meaning | Gender | Origin |
|---|
| Iliana | from Ilium or Troy | Female | Greek |
| Infinity | Endless | Female | English |
| Irving | handsome, fair | Male | Scottish |
| Isaac | laughing one | Male | Hebrew |
| Isabella | pledged to God | Female | Spanish |
| Isis | throne | Female | Egyptian |
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Ivy | ivy plant, a wine | Female | Plant |
| 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 |
| Jackpot | | Unisex | Hebrew |
| Jackson | Son of Jack | Male | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| Jacqueline | Feminine form of Jacques
| Female | |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Jasmine | Flower
| Female | Persian |
| Jason | the Lord is salvation | Male | Hebrew |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |