Where does “مَمْنُون” come from?

مَمْنُون (Arabic) comes from Arabic مَنَّ — to be gracious.

Ancestry of “مَمْنُون”, step by step

Step	Language	Word	Meaning
1	Arabic	مَنَّ	to be gracious

مَمْنُون — Etymology, Origin & Word History | Etymology Explorer