Where does “ume-” come from?

ume- (Alemannic German) comes from Vietnamese mẹ, from Chinese 迷.

Ancestry of “ume-”, step by step

Step	Language	Word	Meaning
1	Vietnamese	mẹ	a mother; I/me, your mother; you, my mother
2	Chinese	迷	—

ume- — Etymology, Origin & Word History | Etymology Explorer