| Jet | | - | Dutch | |
| Jetta | | YET-tah | Dutch | |
| Jette | | YET-tə | Dutch | |
| Jo | | JO (English) | English, German, Dutch | |
| JoËL | | zho-EL (French) | French, Dutch | |
| Job | | JOB (English), YAWP (Dutch) | Biblical, Dutch | |
| Jochem | | YO-khəm | Dutch | |
| Jodocus | | yo-DO-kəs (Dutch) | Dutch (Archaic), Ancient Celtic (Latinized) | |
| Joep | | YOOP | Dutch | |
| Joeri | | YOO-ree | Dutch | |
| Johan | | YOO-ahn (Swedish) | Swedish, Norwegian, Danish, Dutch | |
| Johanna | | yo-HAH-nah (German), yo-HAHN-nah (Danish, Dutch), YO-hahn-nah (Finnish) | German, Swedish, Norwegian, Danish, Dutch, Hungarian, Finnish, Estonian, English, Late Roman | |
| Johanneke | | yo-HAHN-nə-kə | Dutch | |
| Johannes | | yo-HAH-nes (German), yo-HAHN-nəs (Dutch, Danish), YO-hahn-nes (Finnish) | German, Dutch, Swedish, Norwegian, Danish, Finnish, Estonian, Late Roman | |
| Jolanda | | yo-LAHN-dah (Dutch, Italian) | Dutch, Slovene, Croatian, Italian | |