Nushīn
Nushīn is Persian in origin and culturally used by Muslims in Persianate regions. It is a descriptive name (meaning 'sweet/pleasant') and is acceptable in Islamic naming practice.
No. Nushīn is not in the Quran; it is a Persian lexical name rather than a Quranic proper noun.
It is primarily found in Iran, Afghanistan, and among Persian-speaking communities; usage outside these areas is rare but present in diaspora communities.
The name derives from the Persian root nūš/nuš (to drink, to taste) with the adjectival suffix -īn, giving the sense 'sweet/tasty/pleasant'.
The lexical root appears in various Persian compounds, but Nushīn itself is used as a feminine given name; masculine Persian names typically use different derivations.