| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iona (1) | ie-ON-ə (English) | English, Scottish | ||
| Iona (2) | - | Russian, Georgian, Biblical Latin | ||
| Ionas | - | Biblical Greek, Biblical Latin | ||
| Ionathan | - | Biblical Greek, Biblical Latin | ||
| Ioram | - | Biblical Latin, Biblical Greek | ||
| Iosaphat | - | Biblical Latin, Biblical Greek | ||
| Ioseph | - | Biblical Greek, Biblical Latin | ||
| Ioses | - | Biblical Greek | ||
| Iosias | - | Biblical Latin, Biblical Greek | ||
| Iosifu | - | Old Church Slavic | ||
| Iosue | - | Biblical Latin | ||
| Iou | - | Biblical Greek | ||
| Ioubal | - | Biblical Greek | ||
| Ioudas | - | Biblical Greek | ||
| Ioudith | - | Biblical Greek |