| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jadvyga | - | Lithuanian | ||
| Jakab | - | Hungarian | ||
| Jamyang | - | Tibetan, Bhutanese | ||
| Jancsi | YAWN-chee | Hungarian | ||
| Jani | YAH-nee (Finnish) | Finnish, Hungarian | ||
| Janika | - | Hungarian | ||
| Janina | yah-NEE-nah (Polish, German), YAH-nee-nah (Finnish) | Polish, Finnish, German, Swedish, Lithuanian | ||
| Jaroslavas | - | Lithuanian | ||
| Jelena | - | Serbian, Croatian, Slovene, Estonian, Latvian, Lithuanian | ||
| JenŐ | - | Hungarian | ||
| Jenci | - | Hungarian | ||
| Johanna | yo-HAH-nah (German), yo-HAHN-nah (Danish, Dutch), YO-hahn-nah (Finnish) | German, Swedish, Norwegian, Danish, Dutch, Hungarian, Finnish, Estonian, English, Late Roman | ||
| JokŪBas | - | Lithuanian | ||
| JolÁN | - | Hungarian | ||
| JolÁNka | - | Hungarian (Rare) |