| Firstname | Gender | Origin | Meaning of name | Form | Pronunciation |
|---|---|---|---|---|---|
| Iagan |  | Gaelic | Little fire | Aodhgagán | (EE gan) |
| Iago | | Hebrew | Grasp by the heel | (ee AH go) | |
| Iain | | Hebrew | God is gracious | John | (EE an) |
| Ian | | Hebrew | God is forgiving | (EE an) | |
| Iana |  | Hebrew | God is forgiving | (YAH nah); (ee AH nah) | |
| Ianthe | | Greek | Violet | Itself | (YAHN theh) |
| Iason | | Greek | Healer | Jason | (YAH son) |
| Ibrahim | | Hebrew | Father of a multitude or many nations | Abraham | (ib ra HEEM) |
| Ichabod | | Hebrew | Glory has departed | Itself | (ICK ah bod) |
| Icie | | English | Ice-like | Icy | (EYE see) |
| Firstname | Gender | Origin | Meaning | Form | Pronunciation |
|---|---|---|---|---|---|
| Icy | | English | Ice-like | Itself | (EYE see) |
| Ida | | German | Work | Itself | (I dah); (EE dah) |
| Idalia | | German | Work | Ida | (ee dah lee ah) |
| Idalina | | German | Work | (i dah LEEN ah); (ee dah LEEN ah) | |
| Idan | | Hebrew | Era | Itself | (ee DAHN) |
| Idelle | | German | Work | (eye DELL) | |
| Iesha | | Arabic | Alive, She who lives | Aisha | (ee YEY shah) |
| Ieuan | | Hebrew | God is gracious | (YIGH yan) | |
| Ignacia | | Latin | Fiery | Ignacio | (ig NAH syah) |
| Ignacio | | Latin | Fiery | Ignatius | (eeg NAH see oh) |