Where does “Rama” come from?

Rama (Portuguese) comes from Sanskrit राम, from Proto-Indo-Iranian raHmás, from Proto-Indo-European reh₁mós — dirty; dirt.

Ancestry of “Rama”, step by step

Step	Language	Word	Meaning
1	Sanskrit	राम	dark, dark-coloured, black; white; pleasing,...
2	Proto-Indo-Iranian	raHmás	—
3	Proto-Indo-European	reh₁mós	dirty; dirt

Rama — Etymology, Origin & Word History | Etymology Explorer