| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iohanna | - | Biblical Latin | ||
| Iohannes | - | Biblical Latin | ||
| Iohel | - | Biblical Latin | ||
| Iokua | - | Hawaiian | ||
| Iolana | - | Hawaiian | ||
| 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 |