| Firstname | Gender | Origin | Meaning of name | Form | Pronunciation |
|---|---|---|---|---|---|
| Ilsa |  | Hebrew | My God is a vow | (IL seh) | |
| Isabell | | Hebrew | My God is a vow | (IZ ah bell) | |
| Idalia | | German | Work | Ida | (ee dah lee ah) |
| Igraine | | English | N/A | Itself | (ee GRAYN) |
| Igrayne | | English | N/A | Igraine | (ee grayne) |
| Ikuye | | Japanese | Fragrant picture | (EE koo yeh) | |
| Ileana | | Greek | Bright, shining one | (EE lee AH nah) | |
| Iliana | | Hebrew | The Lord has responded | (ee lee AHN ah) | |
| Imani | | Swahili | Faith, belief | Itself | (ee MAH nee) |
| Ima | | Japanese | Now; the present | Itself | (EE mah) |
| Firstname | Gender | Origin | Meaning | Form | Pronunciation |
|---|---|---|---|---|---|
| Imanie | | Swahili | Faith, belief | Imani | (ee MAHN ee) |
| Inès | | Greek | Chaste | Agnes | (ee NEHS) |
| Inez | | Greek | Chaste | Agnes | (ee NES) |
| Iolana | | Greek | Violet | Yolanda | (ee o LAH nah) |
| Isadora | | Greek | Gift of Isis | Isidoros | (ee sah DOR ah) |
| Isaye | | Japanese | Blessed with merit | (EE sah yeh) | |
| Isanne | | Hebrew | My God is a vow | (ee SAHN); (ee SAHN nuh) | |
| Izanne | | Hebrew | Grace; favour | (ee SAN) | |
| Iseult | | Welsh | Beautiful | Itself | (ee solt) |
| Itzel | | Rainbow lady | Ixchel | (ee TSEL) |