Jauhar
Yes. Jauhar comes from the classical Arabic word 'jawhar' (جَوْهَر) meaning 'essence' or 'jewel' and has been used historically in Arabic-speaking and South Asian Muslim contexts.
Jauhar is used as a unisex name in different regions; usage varies by culture—South Asian families sometimes use it for girls, while in Arab contexts it can appear for boys as well.
No. The exact word as a proper name does not appear as a personal name in the Quran; it is classical Arabic vocabulary attested in lexica and literature.
It connotes preciousness, inner worth or the essential nature of something—qualities valued in Arabic literary and moral vocabulary.
The root jawhar is common in historical nisbas and epithets (e.g., Jawhar), but Jauhar as a modern-style given name is comparatively rare; related historical forms like Jawhar are attested.