Where does “mani” come from?

mani (Malay) comes from Arabic مني, from Arabic ن, from Arabic نِي.

Ancestry of “mani”, step by step

Step	Language	Word	Meaning
1	Arabic	مني	conceptive fluid or discharge; second-person...
2	Arabic	ن	Suffix marking the short or long energetic mood...
3	Arabic	نِي	—