| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Innes | - | Scottish | ||
| Ioab | - | Biblical Latin, Biblical Greek | ||
| Ioachim | - | Judeo-Christian Legend | ||
| Ioakeim | - | Judeo-Christian Legend | ||
| Ioane | - | Georgian (Archaic) | ||
| 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 |