Where does “Fujiwara” come from?

Fujiwara comes from Old Japanese 藤, which combined with Japanese 原 to form Japanese 藤原.

Ancestry of “Fujiwara”, step by step

Step	Language	Word	Meaning
1	Japanese	藤原	—
2	Japanese	藤	a wisteria, "especially" the Japanese wisteria,...
3	Old Japanese	藤	{{taxlink\|Wisteria...
4	Proto-Oceanic	pudi	—
5	Proto-Malayo-Polynesian	punti	—
6	Proto-Austronesian	punti	banana

Fujiwara — Etymology, Origin & Word History | Etymology Explorer