| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jernej | - | Slovene | ||
| Jerneja | - | Slovene | ||
| JoŠT | - | Slovene | ||
| JoŽE | YAW-zhe | Slovene | ||
| JoŽEf | YAW-zhef | Slovene | ||
| JoŽEfa | YAW-zhe-fah | Slovene | ||
| JoŽIca | - | Slovene, Croatian | ||
| Jolanda | yo-LAHN-dah (Dutch, Italian) | Dutch, Slovene, Croatian, Italian | ||
| Josip | - | Croatian, Slovene | ||
| Jozefa | YO-ze-faw (Hungarian) | Hungarian, Slovene | ||
| Julij | - | Slovene | ||
| Julija | YOO-lee-yah (Slovene) | Slovene, Croatian, Lithuanian | ||
| Julijana | - | Slovene, Croatian, Serbian, Macedonian | ||
| Jure | - | Slovene, Croatian | ||
| Jurica | - | Croatian, Slovene |