| Name | Meaning | Gender | Origin |
|---|
| Irma | universal, complete | Female | |
| Irving | handsome, fair | Male | Scottish |
| Irwin | boar friend | Male | English |
| Isa | strong-willed | Female | |
| Isabella | pledged to God | Female | Spanish |
| Isabelle | pledged to God | Female | |
| Isadora | gift of the moon | Female | Greek |
| Isaiah | salvation of the Lord | Male | Hebrew |
| Ishmael | outcast | Male | Hebrew |
| Isidor | Gift Of Isis, Mythical Goddess Of Sky And Nature | Unisex | Russian |
| Isis | throne | Female | Egyptian |
| Isolde | beautiful | Female | Welsh |
| Issac | laughter | Male | Hebrew |
| Ivana | God is gracious | Female | Feminine |
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Ivy | ivy plant, a wine | Female | Plant |
| Jace | Hebrew, the Lord is salvation | Male | Hebrew |
| Jacinda | Beautiful
| Female | English |
| 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 |
| Jada | wise | Female | Spanish |
| Jaffa | beautiful | Female | Hebrew |
| Jago | A character in a Victorian book who battled against the odds | Male | Spanish |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |