| JÖRan | | - | Swedish | |
| JÖRgen | | - | Swedish | |
| Jacob | | JAY-kəb (English), YAH-kawp (Dutch) | English, Dutch, Swedish, Norwegian, Danish, Jewish, Biblical | |
| Jakob | | YAH-kawp (German), YAH-kob (Danish) | German, Swedish, Norwegian, Danish, Icelandic, Dutch, Slovene | |
| Jan (1) | | YAHN (Dutch, Swedish, Norwegian, Polish, German) | Dutch, Swedish, Norwegian, Danish, Czech, Polish, Slovene, German, Catalan | |
| Janina | | yah-NEE-nah (Polish, German), YAH-nee-nah (Finnish) | Polish, Finnish, German, Swedish, Lithuanian | |
| Janna | | YAHN-nah (Dutch, Finnish), JAN-ə (English) | Dutch, Swedish, Finnish, English | |
| Janne (1) | | YAHN-ne | Finnish, Swedish | |
| Jannicke | | YAHN-nik-ke (Swedish) | Norwegian, Swedish, Danish | |
| Jannike | | YAHN-ni-ke (Swedish) | Norwegian, Swedish, Danish | |
| Jarl | | YAHRL (Norwegian, Swedish, Danish) | Norwegian, Swedish, Danish, Norse Mythology, Ancient Scandinavian | |
| Jeanette | | zha-NET (French), jə-NET (English), shah-NET (Swedish) | French, English, Danish, Swedish, Norwegian, Dutch | |
| Jennie | | JEN-ee (English) | English, Swedish | |
| Jennifer | | JEN-i-fər (English) | English, German, Dutch, Swedish, Spanish | |
| Jenny | | JEN-ee (English) | English, Swedish, Finnish, German, Dutch, Spanish | |