| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ivor | IE-vawr (English), EE-vawr (English) | Irish, Scottish, Welsh, English (British) | ||
| Ivory | IE-və-ree, IEV-ree | African American | ||
| 'Iyyov | - | Biblical Hebrew | ||
| IzaÄK | - | Dutch | ||
| Izdihar | - | Arabic | ||
| Izem | - | Northern African, Berber | ||
| 'Izevel | - | Biblical Hebrew | ||
| Izrail | - | Judeo-Christian Legend | ||
| Izz Al-Din | - | Arabic | ||
| Izz Ud-Din | - | Arabic | ||
| JÁChym | - | Czech | ||
| JÉRÉMie | - | French | ||
| JÉRÔMe | zhe-ROM | French | ||
| JÓHann | - | Icelandic | ||
| JÓHanna | - | Icelandic |