Where does “Sunda” come from?

Sunda is an English term derived from Indonesian Pasundan, a place name in western Java whose original meaning is unknown.

Ancestry of “Sunda”, step by step

Step	Language	Word	Meaning
1	Indonesian	Pasundan	West Java
2	Sundanese	Sunda	—
3	Sanskrit	सु-	good, well
4	Proto-Indo-Aryan	Hsu-	—
5	Proto-Indo-Iranian	Hsu-	good
6	Proto-Indo-European	h₁su-	good
7	Proto-Indo-European	h₁wes-	good; to be cheerful, happy; to eat, to feast

Sunda — Etymology, Origin & Word History | Etymology Explorer