| 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) | |
| 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) |
| Idan | | Hebrew | Era | Itself | (ee DAHN) |
| Ieuan | | Hebrew | God is gracious | (YIGH yan) | |
| Ignacio | | Latin | Fiery | Ignatius | (eeg NAH see oh) |
| Firstname | Gender | Origin | Meaning | Form | Pronunciation |
|---|---|---|---|---|---|
| Ignatius | | Latin | Fiery | Itself | (ig NAY shus) |
| Igor | | Norse | Yew, bow + Army | (EE gor) | |
| Ike | | Hebrew | He laughs | Isaac | (ike) |
| Illya | | Hebrew | My God is the Lord | Elijah | (IL ya) |
| Immanuel | | Hebrew | God is with us | Itself | (ih MAN yoo el) |
| Imrie | | Hebrew | My utterance | Imri | (eem ree) |
| Indra | | Sanskrit | Possess drops of rain; sky and rain god | Itself | (IN drah) |
| Ingram | | Germanic | Tribes name + raven | Itself | (ING grahm) |
| Inigo | | Latin | Fiery | Ignacio | (in EE goe) |
| Innocent | | Latin | Innocence; unselfish | (IN oh sent) |