| Name | Meaning | Gender | Origin |
|---|
| Ida | prosperous | Female | |
| Indigo | A dark blue plant dye | Female | Greek |
| Isabel | concecrated to God | Female | Spanish |
| Ishmael | outcast | Male | Hebrew |
| Isis | throne | Female | Egyptian |
| Isolda | Rule of ice
| Female | |
| Isolde | beautiful | Female | Welsh |
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Ivy | ivy plant, a wine | Female | Plant |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jagger | a teamster | Male | English |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jett | Jet Black Gem | Male | English |
| Jezabel | | Unisex | Hebrew |
| Jezebel | follower of idols | Female | Hebrew |
| Jinx | Charm, Spell | Female | Latin |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| John | God is merciful | Male | Hebrew |
| Jordan | The descending river, to flow | Male | Hebrew |
| Juliet | youthful | Female | English |
| Kala | time, black | Unisex | |