| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jo | [dʒəu] | |||
| JO | JO (English) | English, German, Dutch | ||
| JOĈJO | YO-chyo | Esperanto | ||
| JOŠKO | - | Croatian | ||
| JOŠT | - | Slovene | ||
| JOŽE | YAW-zhe | Slovene | ||
| JOŽEF | YAW-zhef | Slovene | ||
| JOŽEFA | YAW-zhe-fah | Slovene | ||
| JOŽICA | - | Slovene, Croatian | ||
| JOÃO | ZHWOWN, zhoo-OWN | Portuguese | ||
| JOÃOZINHO | - | Portuguese | ||
| JOËL | zho-EL (French) | French, Dutch | ||
| JOËLLE | zho-EL | French | ||
| JOAB | JO-ab (English) | Biblical | ||
| 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 |