| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iolanda | - | Italian, Portuguese, Romanian | ||
| Iolanthe | ie-ə-LAN-thee (English) | Various | ||
| Ion (1) | YON (Romanian) | Basque, Romanian | ||
| Iona (2) | - | Russian, Georgian, Biblical Latin | ||
| Ionas | - | Biblical Greek, Biblical Latin | ||
| Ionathan | - | Biblical Greek, Biblical Latin | ||
| Ionel | yo-NEL | Romanian | ||
| Ionela | yo-NEL-ah | Romanian | ||
| IonuȚ | - | Romanian | ||
| Ioram | - | Biblical Latin, Biblical Greek | ||
| Iordan | - | Bulgarian | ||
| Iosaphat | - | Biblical Latin, Biblical Greek | ||
| Ioseb | - | Georgian | ||
| Ioseph | - | Biblical Greek, Biblical Latin | ||
| Iosephus | - | Late Roman |