| Name | Meaning | Gender | Origin |
|---|
| Illa | | Unisex | Hebrew |
| India | Of India | Female | English |
| Inez | pure, virginal | Female | Portuguese |
| Inga | guarded by Ing | Female | Norse |
| Ingrid | Ing's ride | Female | Norse |
| Iona | flower name, purple jewel | Female | Scottish |
| Iris | rainbow, a play of colours | Female | |
| Irma | universal, complete | Female | |
| Isa | strong-willed | Female | |
| Isabella | pledged to God | Female | Spanish |
| Isabelle | pledged to God | Female | |
| Isadora | gift of the moon | Female | Greek |
| Isidor | Gift Of Isis, Mythical Goddess Of Sky And Nature | Unisex | Russian |
| Isis | throne | Female | Egyptian |
| Isolde | beautiful | Female | Welsh |
| Ivana | God is gracious | Female | Feminine |
| Ivy | ivy plant, a wine | Female | Plant |
| Jacinda | Beautiful
| Female | English |
| Jada | wise | Female | Spanish |
| Jaffa | beautiful | Female | Hebrew |
| Jama | | Unisex | Hebrew |
| Jamee | supplanter, one who replaces | Unisex | |
| Jasmine | Flower
| Female | Persian |
| Jemima | dove | Female | Hebrew |
| Jennie | English, God's gracious gift | Female | English |