Where does “ཡུན་ནན་ཞིང་ཆེན” come from?

ཡུན་ནན་ཞིང་ཆེན (Tibetan) comes from Tibetan ཞིང་ཆེན, from Tibetan ཞིང, from Proto-Sino-Tibetan b-liŋ — field; forest.

Ancestry of “ཡུན་ནན་ཞིང་ཆེན”, step by step

Step	Language	Word	Meaning
1	Tibetan	ཞིང་ཆེན	province
2	Tibetan	ཞིང	field, ground, farmland; region, country, sphere,...
3	Proto-Sino-Tibetan	b-liŋ	field; forest

ཡུན་ནན་ཞིང་ཆེན — Etymology, Origin & Word History | Etymology Explorer