Where does “bella” come from?

bella (Old Dutch) comes from Proto-Germanic bellǭ, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “bella”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	bellǭ	bell
2	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
3	Proto-Indo-European	bʰōl-	—

bella — Etymology, Origin & Word History | Etymology Explorer