| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| JÓZefa | yuw-ZEF-ah | Polish | ||
| JÓZefina | - | Polish | ||
| JÔNatas | - | Portuguese | ||
| JØRg | - | Danish, Norwegian | ||
| JØRgen | - | Danish, Norwegian | ||
| JØRn | - | Danish, Norwegian | ||
| JÖRan | - | Swedish | ||
| JÖRgen | - | Swedish | ||
| JÚLia | ZHOO-lyə (Portuguese), YOO-lee-aw (Hungarian) | Portuguese, Catalan, Hungarian, Slovak | ||
| JÚLius | - | Slovak | ||
| JaŠA | - | Slovene | ||
| Jaagup | - | Estonian | ||
| Jaak | - | Estonian, Flemish | ||
| Jaakkima | YAH:K-kee-mah | Finnish | ||
| Jaakko | YAH:K-ko | Finnish |