| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| IOSIF | ee-O-seef (Russian), YO-seef (Romanian) | Russian, Romanian, Greek | ||
| IOSIFU | - | Old Church Slavic | ||
| IOSUE | - | Biblical Latin | ||
| IOU | - | Biblical Greek | ||
| IOUBAL | - | Biblical Greek | ||
| IOUDAS | - | Biblical Greek | ||
| IOUDITH | - | Biblical Greek | ||
| IOUNIA | - | Biblical Greek | ||
| IOVIANUS | - | Ancient Roman | ||
| IOVIS | - | Roman Mythology | ||
| IOVITA | - | Ancient Roman | ||
| IPATI | - | Russian (Rare) | ||
| IPATIY | - | Russian (Rare) | ||
| IPHIGENEIA | - | Greek Mythology | ||
| IPHIGENIA | - | Greek Mythology (Latinized) |