| 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 | |
| Iou | | - | Biblical Greek | |
| Ioubal | | - | Biblical Greek | |
| Ioudas | | - | Biblical Greek | |
| Ioudith | | - | Biblical Greek | |
| Iounia | | - | Biblical Greek | |
| Isaak | | ee-SAH-ahk (Russian) | Russian, German, Biblical Greek | |
| Ismael | | - | Spanish, Biblical Greek | |
| Israel | | IZ-ray-əl (English), IZ-ree-əl (English) | Jewish, English, Biblical, Biblical Greek | |