| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ioan | - | Romanian, Welsh, Bulgarian | ||
| Ioana | - | Romanian, Bulgarian | ||
| Ioane | - | Georgian (Archaic) | ||
| Ioann | - | Russian | ||
| 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 | ||
| Iokua | - | Hawaiian | ||
| Iolana | - | Hawaiian |