| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ivor | IE-vawr (English), EE-vawr (English) | Irish, Scottish, Welsh, English (British) | ||
| Ivy | IE-vee | English | ||
| Iwan | EE-wan (Welsh), EE-vahn (Polish) | Welsh, Polish | ||
| Iwo | EE-vaw | Polish | ||
| Iwona | ee-VAW-nah | Polish | ||
| Iza | - | Polish | ||
| 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 | ||
| Izar | - | Basque | ||
| Izaro | - | Basque |