| Inga the swag | Modern name with no specific meaning, possibly a nickname |
| Innocentius | Latin name meaning 'innocent' or 'pure' |
| Innocenzo | Italian name meaning 'innocent' or 'pure' |
| Innokentiy | Russian name meaning 'innocent' or 'pure' |
| Inus | Derived from Latin, meaning 'of the island' |
| Ionas | Hebrew name meaning 'God is gracious' |
| Iouis | Latin name meaning 'youthful' or 'full of life' |
| Ioulianos | Greek name meaning 'youthful' or 'full of life' |
| Ir | Watchman, city, vision |
| Irati | A Basque name meaning fern field. |
| Ireene | A peaceful woman, in mythology, the goddess of peace |
| Ireinei | A name meaning bringer of peace. |
| Irenka | A name meaning little peace. |
| Irinushka | A sweet form of the name Irina. |
| Irja | A name meaning peace or quietness. |
| Irminhild | Derived from Old High German, means 'noble strength' |
| Irmlinde | Overall, powerful and soft, mild |
| Irrylath | Unknown or unverified origin |
| Isaabella | My god is bountiful, God |
| Isaeah | Yahweh is salvation |
| Isaija | Yahweh is salvation |
| Isbel | One who is devoted to the Lord. |
| Ish Pan | Hid broken in two |
| Ish Tob | A man who is good and upright. |
| Ishbi Benob | Respiration conversion taking captive |
| Ishild | Fighting the ice battle |
| Isidoros | A gift from the goddess Isis. |
| Isler | Tiler, tile maker, a brick, a tile |
| Isley | English, means 'God is my salvation' |
| Isobell | English, means 'God is my oath' |
| Isrrael | Contender with god |
| Issabel | My god is bountiful, God |
| Issabela | My god is bountiful, God |
| Issabella | My god is bountiful, God |
| Issai | Meaning salvation from God. |
| Issisa | A name of unknown derivation. |
| Issise | A rare and unique name form. |
| Isys | A name meaning a divine being. |
| Italino | Italian, means 'Italian' or 'from Italy' |
| Italus | Derived from the Italian land. |