| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iordan | - | Bulgarian | ||
| Iosaphat | - | Biblical Latin, Biblical Greek | ||
| Ioseb | - | Georgian | ||
| Ioseph | - | Biblical Greek, Biblical Latin | ||
| Iosephus | - | Late Roman | ||
| Ioses | - | Biblical Greek | ||
| Iosias | - | Biblical Latin, Biblical Greek | ||
| Iosif | ee-O-seef (Russian), YO-seef (Romanian) | Russian, Romanian, Greek | ||
| Iosifu | - | Old Church Slavic | ||
| Iosue | - | Biblical Latin | ||
| Iou | - | Biblical Greek | ||
| Ioubal | - | Biblical Greek | ||
| Ioudas | - | Biblical Greek | ||
| Ioudith | - | Biblical Greek | ||
| Iounia | - | Biblical Greek |