| Jocosa | | - | Medieval English | |
| Jodene | | JO-deen | English (Rare) | |
| Jodi | | JO-dee | English | |
| Jodie | | JO-dee | English | |
| Jody | | JO-dee | English | |
| Joe | | JO | English | |
| Joel | | JOL (English), JO-əl (English), ho-EL (Spanish), zhoo-EL (Portuguese), YO-el (Swedish, Finnish) | English, Spanish, Portuguese, Swedish, Finnish, Biblical | |
| Joella | | - | English | |
| Joelle | | - | English | |
| Joetta | | - | English | |
| Joey | | JO-ee | English | |
| 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 | |
| Johanne | | zho-AN (French), yo-HAHN-ne (Danish) | French, Danish, Norwegian, Medieval French | |
| Johannes | | yo-HAH-nes (German), yo-HAHN-nəs (Dutch, Danish), YO-hahn-nes (Finnish) | German, Dutch, Swedish, Norwegian, Danish, Finnish, Estonian, Late Roman | |