| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iulius | YOO:-li-uws | Ancient Roman | ||
| 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 | ||
| Iva (2) | - | Czech, Slovak, Slovene | ||
| Ivah | - | Biblical |