Where does “富士” come from?

富士 (Vietnamese) comes from Japanese 富士, from Old Japanese 富士, from Ainu フヂ — fire.

Ancestry of “富士”, step by step

StepLanguageWordMeaning
1Japanese富士a hill resembling Mount Fuji
2Old Japanese富士—
3Ainuフヂfire
Every word from Ainu フヂ →Every word from Old Japanese 富士 →Every word from Japanese 富士 →