| 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 | |
| JolÁN | | - | Hungarian | |
| JolÁNka | | - | Hungarian (Rare) | |
| Jozefa | | YO-ze-faw (Hungarian) | Hungarian, Slovene | |
| Judit | | YOO-deet (Hungarian) | Hungarian, Spanish, Swedish, Norwegian, Danish | |
| Juli | | YOO-lee | Hungarian | |
| Julianna | | yuw-lee-AHN-nah (Polish), joo-lee-AHN-ə (English) | Hungarian, Polish, English | |