| Jaap | | YAH:P | Dutch | |
| Jacintha | | yah-SIN-tah | Dutch (Rare) | |
| Jacob | | JAY-kəb (English), YAH-kawp (Dutch) | English, Dutch, Swedish, Norwegian, Danish, Jewish, Biblical | |
| Jacoba | | yah-KO-bah | Dutch | |
| Jacobina | | yah-ko-BEE-nah | Dutch | |
| Jacobine | | yah-ko-BEE-nə (Dutch) | Norwegian, Danish, Dutch | |
| Jacobus | | yah-KO-bus (Dutch) | Dutch, Late Roman | |
| Jacomina | | yah-ko-MEE-nah | Dutch | |
| 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 | |
| Jana (1) | | YAH-nah (Dutch, German) | Czech, Slovak, Dutch, German, Slovene, Catalan | |
| Janine | | zha-NEEN (French), jə-NEEN (English) | French, English, Dutch, German | |
| Janna | | YAHN-nah (Dutch, Finnish), JAN-ə (English) | Dutch, Swedish, Finnish, English | |
| Janneke | | YAHN-nə-kə | Dutch | |
| Jantine | | yahn-TEE-nə | Dutch | |