| Jannik | | - | Danish | |
| Jannike | | YAHN-ni-ke (Swedish) | Norwegian, Swedish, Danish | |
| Jannine | | jə-NEEN | English (Rare) | |
| Janusz | | YAH-nuwsh | Polish | |
| Japik | | - | Frisian (Rare) | |
| Jaqueline | | JAK-ə-leen (English), JAK-ə-lin (English) | English (Modern), Portuguese (Brazilian) | |
| Jaquelyn | | JAK-ə-lin | English (Rare) | |
| Jared | | JER-əd (English), JAR-əd (English) | English, Biblical | |
| Jarek | | YAH-rek (Polish) | Polish, Czech | |
| Jari | | YAH-ree | Finnish | |
| Jarkko | | YAHRK-ko | Finnish | |
| Jarl | | YAHRL (Norwegian, Swedish, Danish) | Norwegian, Swedish, Danish, Norse Mythology, Ancient Scandinavian | |
| Jarlath | | JAHR-lath | Irish | |
| Jarmila | | - | Czech, Slovak | |
| Jarmo | | YAHR-mo | Finnish | |