| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ioram | - | Biblical Latin, Biblical Greek | ||
| Iosaphat | - | Biblical Latin, Biblical Greek | ||
| Ioseph | - | Biblical Greek, Biblical Latin | ||
| Ioses | - | Biblical Greek | ||
| Iosias | - | Biblical Latin, Biblical Greek | ||
| Iosue | - | Biblical Latin | ||
| Iou | - | Biblical Greek | ||
| Ioubal | - | Biblical Greek | ||
| Ioudas | - | Biblical Greek | ||
| Ioudith | - | Biblical Greek | ||
| Iounia | - | Biblical Greek | ||
| 'Ira' | - | Biblical Hebrew | ||
| Ira (1) | IE-rə (English) | Biblical, English, Hebrew | ||
| Isaac | IE-zək (English) | English, Jewish, Biblical, Biblical Latin | ||
| Isaak | ee-SAH-ahk (Russian) | Russian, German, Biblical Greek |