| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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 | ||
| Iounia | - | Biblical Greek | ||
| Iovianus | - | Ancient Roman | ||
| Iovita | - | Ancient Roman | ||
| Iqbal | - | Arabic | ||
| IrÉNÉE | ee-re-NE | French |