| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iokua | - | Hawaiian | ||
| Iolana | - | Hawaiian | ||
| Iolanda | - | Italian, Portuguese, Romanian | ||
| Ion (1) | YON (Romanian) | Basque, Romanian | ||
| Iona (2) | - | Russian, Georgian, Biblical Latin | ||
| Ionel | yo-NEL | Romanian | ||
| Ionela | yo-NEL-ah | Romanian | ||
| IonuȚ | - | Romanian | ||
| Iordan | - | Bulgarian | ||
| Ioseb | - | Georgian | ||
| Iosephus | - | Late Roman | ||
| Iosif | ee-O-seef (Russian), YO-seef (Romanian) | Russian, Romanian, Greek | ||
| Iovianus | - | Ancient Roman | ||
| Iovis | - | Roman Mythology | ||
| Iovita | - | Ancient Roman |