Where does “bol” come from?

bol (Middle Dutch) comes from Old Dutch bolla, from Proto-Germanic bullǭ, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “bol”, step by step

Step	Language	Word	Meaning
1	Old Dutch	bolla	—
2	Proto-Germanic	bullǭ	round object, ball; round vessel, bowl
3	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
4	Proto-Indo-European	bʰōl-	—

bol — Etymology, Origin & Word History | Etymology Explorer