| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ianuarius | - | Ancient Roman | ||
| Iovianus | - | Ancient Roman | ||
| Iovita | - | Ancient Roman | ||
| Iulia | YOO:-li-a (Ancient Roman) | Romanian, Ancient Roman | ||
| Iuliana | - | Romanian, Ancient Roman | ||
| Iulianus | - | Ancient Roman | ||
| Iulius | YOO:-li-uws | Ancient Roman | ||
| Iunia | - | Ancient Roman, Biblical Latin | ||
| Iunius | - | Ancient Roman | ||
| Iuvenalis | - | Ancient Roman |