| Joost | | YO:ST | Dutch | |
| Jordaan | | yawr-DAH:N | Dutch | |
| Joris | | YO-ris (Dutch) | Dutch, Frisian | |
| Jos | | YAWS | Dutch | |
| Josephine | | JO-sə-feen (English), yo-ze-FEE-nə (German) | English, German, Dutch | |
| Josephus | | YO-sə-fus (Dutch) | Dutch, History | |
| Jozef | | YO-zəf (Dutch) | Slovak, Dutch | |
| Jozefien | | yo-zə-FEEN | Dutch | |
| Jozua | | YO-zuy-ah | Dutch | |
| Judocus | | - | Dutch (Archaic), Ancient Celtic (Latinized) | |
| Julia | | JOO-lee-ə (English), YOO-lee-ah (German, Swedish, Danish, Finnish), HOO-lyah (Spanish), YUWL-yah (Polish), YOO-lee-yah (Russian), YOO:-lee-ah (Ancient Roman) | English, German, Swedish, Norwegian, Danish, Dutch, Spanish, Polish, Finnish, Russian, Ukrainian, An | |
| Juliana | | yuy-lee-AH-nah (Dutch), yoo-lee-AH-nah (German), joo-lee-AHN-ə (English) | Dutch, German, English, Spanish, Portuguese, Ancient Roman | |
| Julie | | zhuy-LEE (French), YOO-lee-e (Danish), YUW-lye (Czech), JOO-lee (English) | French, Danish, Norwegian, Czech, English, German, Dutch, Spanish, Portuguese | |
| Jurgen | | - | Dutch | |
| Jurriaan | | YUR-ree-ah:n | Dutch | |