Where does “남남북녀” come from?

남남북녀 (Korean) comes from Chinese 女, from Proto-Sino-Tibetan *ŋaq.

남남북녀 (Korean): in dynastic Korea, the notion that the most competent men are from the southernmost provinces and that the most beautiful women are from the northernmost provinces

Definitions

in dynastic Korea, the notion that the most competent men are from the southernmost provinces and that the most beautiful women are from the northernmost provinces

Ancestry of “남남북녀”, step by step

Step	Language	Word	Meaning
1	Chinese	女	—
2	Proto-Sino-Tibetan	*ŋaq	—

Every word from Proto-Sino-Tibetan *ŋaq →Every word from Chinese 女 →