| Jam | | - | Persian Mythology | |
| Jamaar | | jə-MAHR | African American (Rare) | |
| Jamar | | jə-MAHR | African American | |
| Jamshed | | - | Persian, Tajik, Persian Mythology | |
| Jamsheed | | - | Persian, Persian Mythology | |
| Jamshid | | - | Persian, Persian Mythology | |
| Jamyang | | - | Tibetan, Bhutanese | |
| Jan (1) | | YAHN (Dutch, Swedish, Norwegian, Polish, German) | Dutch, Swedish, Norwegian, Danish, Czech, Polish, Slovene, German, Catalan | |
| Jana (1) | | YAH-nah (Dutch, German) | Czech, Slovak, Dutch, German, Slovene, Catalan | |
| Jana (2) | | YAH-nah | Croatian, Serbian | |
| Jancsi | | YAWN-chee | Hungarian | |
| Jani | | YAH-nee (Finnish) | Finnish, Hungarian | |
| Janika | | - | Hungarian | |
| Janina | | yah-NEE-nah (Polish, German), YAH-nee-nah (Finnish) | Polish, Finnish, German, Swedish, Lithuanian | |
| Janine | | zha-NEEN (French), jə-NEEN (English) | French, English, Dutch, German | |