| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| IVY | IE-vee | English | ||
| IWAN | EE-wan (Welsh), EE-vahn (Polish) | Welsh, Polish | ||
| IWO | EE-vaw | Polish | ||
| IWONA | ee-VAW-nah | Polish | ||
| IXCHEL | - | Mayan Mythology | ||
| IYOV | - | Hebrew | ||
| IZA | - | Polish | ||
| IZAÄK | - | Dutch | ||
| IZAAK | - | Polish | ||
| IZABEL | - | Portuguese (Brazilian) | ||
| IZABELA | ee-zah-BE-lah | Polish | ||
| IZABELLA | ee-zah-BEL-lah (Polish) | Hungarian, Polish | ||
| IZABELLE | IZ-ə-bel | English (Modern) | ||
| IZANAGI | - | Far Eastern Mythology | ||
| IZANAMI | - | Far Eastern Mythology |