| Jessica | | JES-i-kə (English) | English, French, German, Swedish, Norwegian, Danish, Italian, Spanish, Portuguese | |
| Jesusa | | - | Spanish | |
| Jimena | | hee-ME-nah | Spanish | |
| Jimeno | | hee-ME-no | Spanish (Rare) | |
| JoaquÍN | | hwah-KEEN | Spanish | |
| Joaquina | | hwah-KEE-nah | Spanish | |
| Joel | | JOL (English), JO-əl (English), ho-EL (Spanish), zhoo-EL (Portuguese), YO-el (Swedish, Finnish) | English, Spanish, Portuguese, Swedish, Finnish, Biblical | |
| Jonatan | | YO-nah-tahn (German) | Spanish, Swedish, Norwegian, Danish, German | |
| JordÁN | | hor-DAHN | Spanish | |
| Jordana | | hor-DAH-nah (Spanish), jawr-DAN-ə (English) | Spanish, Portuguese, Macedonian, English (Rare) | |
| Jorge | | HOR-khe (Spanish), ZHAWR-zhə (Portuguese) | Spanish, Portuguese | |
| JosÉ | | ho-SE (Spanish), zhoo-ZE (Portuguese) | Spanish, Portuguese | |
| Josefa | | ho-SE-fah (Spanish) | Spanish, Portuguese, Czech | |
| Josefina | | ho-se-FEE-nah (Spanish), zhoo-zə-FEE-nə (Portuguese), yoo-se-FEE-nah (Swedish) | Spanish, Portuguese, Swedish | |
| JosemarÍA | | - | Spanish | |