Where does “Bételgeuse” come from?

Bételgeuse (French) comes from Arabic مَنْكِب اَلْجَوْزَاء.

Ancestry of “Bételgeuse”, step by step

Step	Language	Word	Meaning
1	Arabic	مَنْكِب اَلْجَوْزَاء	—

Bételgeuse — Etymology, Origin & Word History | Etymology Explorer