| Jocelyne | | zho-sə-LEEN | French | |
| Joffrey | | - | French | |
| Johanne | | zho-AN (French), yo-HAHN-ne (Danish) | French, Danish, Norwegian, Medieval French | |
| Jonathan | | JAHN-ə-thən (English), YO-nah-tahn (German) | English, German, Swedish, Norwegian, Danish, Dutch, French, Biblical | |
| JosÉE | | zho-ZE | French | |
| JosÉPhine | | zho-ze-FEEN | French | |
| JosÈPhe | | - | French | |
| Joseph | | JO-səf (English), zho-ZEF (French), YO-zef (German) | English, French, German, Biblical | |
| Josette | | zho-ZET | French | |
| Josiane | | - | French | |
| Josse | | - | French (Rare), Medieval French | |
| Josselin | | - | French | |
| Josseline | | - | French | |
| JosuÉ | | ho-SWE (Spanish), zho-zoo-E (Portuguese) | French, Spanish, Portuguese | |
| Jourdain | | - | French | |