| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| JÁKob | - | Hungarian | ||
| JÁNos | YAH-nosh | Hungarian | ||
| JÁZmin | YAHZ-meen | Hungarian | ||
| JÓSka | - | Hungarian | ||
| JÓZsef | YO-zhef | Hungarian | ||
| JÓZsi | YO-zhee | Hungarian | ||
| JÓZsua | YO-zhoo-aw | Hungarian | ||
| JÚLia | ZHOO-lyə (Portuguese), YOO-lee-aw (Hungarian) | Portuguese, Catalan, Hungarian, Slovak | ||
| 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 |