Where does “رُبَاب” come from?

رُبَاب (Classical Persian) comes from Arabic رباب — plural of رُبّ; verbal noun of رَبَّ.

Ancestry of “رُبَاب”, step by step

Step	Language	Word	Meaning
1	Arabic	رباب	plural of رُبّ; verbal noun of رَبَّ