| 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 | ||
| Jakab | - | Hungarian | ||
| Jancsi | YAWN-chee | Hungarian | ||
| Jani | YAH-nee (Finnish) | Finnish, Hungarian | ||
| Janika | - | Hungarian | ||
| 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 |