Delkash
No. Delkash is Persian in origin and not from Arabic roots; it is used in Persianate and South Asian Muslim contexts.
Literally it means 'heart-drawer' or 'one who captures the heart'; used figuratively to denote charm and attractiveness.
Yes. It is a descriptive Persian name used by many Muslim families; however it is not Qurʾānic or prophetic and is literary in origin.
Delkash is rare; it is known in literary and cultural circles but is not widespread as a modern popular given name.
It is written as دلکش in both Persian and Urdu orthography.