| Jodocus | | yo-DO-kəs (Dutch) | Dutch (Archaic), Ancient Celtic (Latinized) | |
| Joel | | JOL (English), JO-əl (English), ho-EL (Spanish), zhoo-EL (Portuguese), YO-el (Swedish, Finnish) | English, Spanish, Portuguese, Swedish, Finnish, Biblical | |
| Joep | | YOOP | Dutch | |
| Joeri | | YOO-ree | Dutch | |
| Joffrey | | - | French | |
| Johan | | YOO-ahn (Swedish) | Swedish, Norwegian, Danish, Dutch | |
| Johana | | - | Czech | |
| Johanan | | - | Biblical | |
| 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 | |
| Johanne | | zho-AN (French), yo-HAHN-ne (Danish) | French, Danish, Norwegian, Medieval French | |
| 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 | |
| John | | JAHN (English) | English, Biblical | |
| Joktan | | - | Biblical | |
| Jolana | | - | Czech, Slovak | |