| Jadran | Man | Slavic Names |
| Jadranko | Man | Slavic Names |
| Jaka | Man | Slavic Names |
| Jalena | Woman | Slavic Names |
| Jana | Woman | Slavic Names |
| Janika | Unisex | Slavic Names |
| Jaromír | Man | Slavic Names |
| Jasna | Woman | Slavic Names |
| Jasoslava | Woman | Slavic Names |
| Jelena | Woman | Slavic Names |
| Jereni | Woman | Slavic Names |
| Jitka | Woman | Slavic Names |
| Jola | Woman | Slavic Names |
| Jolanda | Woman | Slavic Names |
| Jovan | Man | Slavic Names |
| Jovana | Woman | Slavic Names |
| Jovanna | Woman | Slavic Names |