| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ioanna | - | Greek, Biblical Greek | ||
| Ioannes | - | Biblical Greek | ||
| Ioannu | - | Old Church Slavic | ||
| Iob | - | Biblical Latin, Biblical Greek | ||
| Iodocus | - | Ancient Celtic (Latinized) | ||
| Ioel | - | Biblical Greek | ||
| Iohanna | - | Biblical Latin | ||
| Iohannes | - | Biblical Latin | ||
| Iohel | - | Biblical Latin | ||
| Iomhar | - | Scottish | ||
| 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 |