| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jazmine | JAZ-min | English (Modern) | ||
| Jazmyn | JAZ-min | English (Modern) | ||
| Jeni | JEN-ee | English (Modern) | ||
| Jessi | JES-ee | English (Modern) | ||
| Jessika | YE-si-kah (German), JES-i-kə (English) | German, English (Modern) | ||
| Jett | JET | English (Modern) | ||
| Joi | JOI | English (Modern) | ||
| Jordyn | JAWR-din | English (Modern) | ||
| Jorja | JAWR-jə | English (Modern) | ||
| Joselyn | JAHS-lin, JAHS-ə-lin | English (Modern) | ||
| Joslyn | JAHS-lin | English (Modern) | ||
| Kacey | KAY-see | English (Modern) | ||
| Kacie | KAY-see | English (Modern) | ||
| Kade | KAYD | English (Modern) | ||
| Kaden | KAY-dən | English (Modern) |