| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| JINGYI | - | Chinese | ||
| JI-U | jee-oo | Korean | ||
| JI-WOO | jee-oo | Korean | ||
| JI-YEONG | jee-yung | Korean | ||
| JI-YOUNG | jee-yung | Korean | ||
| JO | JO (English) | English, German, Dutch | ||
| JOCELYN | JAHS-lin (English), JAHS-ə-lin (English) | English, French | ||
| JODY | JO-dee | English | ||
| Joey | ['dʒəui] | |||
| JOEY | JO-ee | English | ||
| JOHNIE | JAHN-ee | English | ||
| JOHNNIE | JAHN-ee | English | ||
| Johns | [dʒɔnz] | |||
| Johnston | ['dʒɔnstən] | |||
| Joiner | ['dʒɔinə] |