| Juliet | | JOO-lee-et, JOOL-yət | English | |
| Julius | | YOO:-li-uws (Ancient Roman), JOO-lee-əs (English), YOO-lee-uws (German) | Ancient Roman, English, German | |
| July | | ju-LIE | English (Rare) | |
| Julyan | | JOOL-yan | English (Rare) | |
| June | | JOON | English | |
| Junior | | JOON-yər | English | |
| Juniper | | JOON-ə-pər | English (Rare) | |
| Justice | | JUS-tis | English | |
| Justin | | JUS-tin (English), zhoo-STEN (French) | English, French, Slovene | |
| Justina | | jus-TEE-nə (English) | English, Slovene, Czech, Lithuanian, Late Roman | |
| Justine | | zhuy-STEEN (French), jus-TEEN (English) | French, English, Dutch, German | |
| Justy | | JUS-tee | English | |
| Jyoti | | - | Indian, Hindi, Marathi, Bengali, Assamese, Nepali | |