| Name | Meaning | Gender | Origin |
| Inness | From the island. | M | Celtic |
| Innis | island | M | Irish |
| Innocent | Innocent. | M | English |
| Innocenty | Innocent. | M | Latin |
| Innocenzio | innocent | M | Italian |
| Ino | Daughter of Cadmus. | F | Greek |
| Inocencia | Innocent | F | Spanish |
| Inocencio | Innocent. | M | Spanish |
| Inoceneia | Innocent. | F | Spanish |
| Inocenta | Innocent. | F | Spanish |
| Inocente | Innocent. | M | Spanish |
| Inoke | Devoted | F | Hawaiian |
| Intercidona | Goddess of birthing. | F | Latin |
| Inteus | Has no shame. | M | Native American |
| Intisar | Triumphant. | F | Arabic |
| Intisara | Triumphant. | F | Arabic |
| Intizara | Triumphant. | F | Arabic |
| Inuus | God of fertility. | M | Latin |
| Invidia | Envious. | F | Latin |
| Inys | From the river island. | M | Irish |
| Inyx | Spell. | F | Latin |
| Ioakim | From Job. | M | Russian |
| Ioan | Gift from God. | M | Hebrew |
| Iob | Diminutive of Iorwerth: Worthy lord. Derived from 'ior' and 'gwerth'. Legendary son of Maredudd. | M | Welsh |
| Iokina | God will Develop | F | Hawaiian |
| Iola | Violet-Colored Dawn | F | Welsh |
| Iolana | Soar Like An Eagle | F | Hawaiian |
| Iolani | Royal Hawk | F | Hawaiian |
| Iolantha | Violet. | F | Greek |
| Iolanthe | Violet flower. The name of a Gilbert and Sullivan Opera from 1882. Also a mythological sea nymph and daughter of Oceanus. | F | Greek |
| Iole | Sister of Iphitus. | F | Greek |
| Iolo | Diminutive of Iorwerth: worthy lord. | M | Welsh |
| Iomar | Archer. | M | Gaelic |
| Iomhar | Archer. | M | Teutonic |
| Ion | God is Good | M | Celtic/Gaelic |
| Iona | Purple Jewel | F | Greek |
| Ionanna | Grace. | F | Hebrew |
| Ione | From the king's island. | F | Celtic |
| Ionessa | Amethyst. | F | Greek |
| Ionia | Amethyst. | F | Greek |
| Ionna | God's gift. | F | Ukrainian |
| Ionnes | Gift from God. | M | Hebrew |
| Iora | Pure. | F | Greek |
| Iorgas | Farmer. | M | Greek |
| Iorwen | Lord/ Beautiful | F | Welsh |
| Iorwerth | Worthy lord. Derived from 'ior' and 'gwerth'. Legendary son of Maredudd. | M | Welsh |
| Iosep | God will multiply. | M | Hebrew |
| Ioseph | God will multiply. | M | Hebrew |
| Iov | God will estahlish. | M | Hebrew |
| Iphedeiah | Redemption of the Lord. | F | Biblical |