| Jitendra | | - | Indian, Hindi, Marathi, Gujarati | |
| Ji-U | | jee-oo | Korean | |
| Ji-Woo | | jee-oo | Korean | |
| Ji-Yeong | | jee-yung | Korean | |
| Ji-Young | | jee-yung | Korean | |
| Ji-Yu | | jee-yoo | Korean | |
| Jo | | JO (English) | English, German, Dutch | |
| JoĈJo | | YO-chyo | Esperanto | |
| JoŠKo | | - | Croatian | |
| JoŽIca | | - | Slovene, Croatian | |
| Joachim | | zho-a-KEEM (French), YO-ah-khim (German), yo-AH-khim (German), yaw-AH-kheem (Polish), JO-ə-kim (English) | French, German, Polish, Judeo-Christian Legend | |
| Joakim | | YO-ah-kim (Swedish), YO-ah-keem (Finnish) | Swedish, Norwegian, Danish, Finnish, Serbian, Macedonian | |
| Joan (2) | | joo-AHN (Catalan), zhoo-AHN (Catalan) | Catalan, Occitan | |
| Joana | | - | Portuguese, Catalan | |
| Joannes | | - | Late Roman | |