| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iunia | - | Ancient Roman, Biblical Latin | ||
| Iunius | - | Ancient Roman | ||
| Iuno | - | Roman Mythology | ||
| Iuppiter | - | Roman Mythology | ||
| Iuri | - | Georgian | ||
| Iustina | - | Late Roman | ||
| Iustinianus | - | Late Roman | ||
| Iustinus | - | Late Roman | ||
| Iustus | - | Late Roman | ||
| Iuvenalis | - | Ancient Roman | ||
| IvÁN | - | Spanish, Hungarian | ||
| Iva (1) | - | Bulgarian, Serbian, Croatian, Macedonian | ||
| Ivailo | - | Bulgarian | ||
| Ivan | ee-VAHN (Russian, Ukrainian), IE-vən (English) | Russian, Bulgarian, Ukrainian, Belarusian, Serbian, Croatian, Czech, Slovak, Macedonian, Slovene, En | ||
| IvanČIca | - | Croatian |