Where does “kuoko” come from?

kuoko (Old Dutch) comes from Proto-Germanic kōkô, from Proto-Indo-European gōg- — round, ball-shaped object; lump; clump.

Ancestry of “kuoko”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	kōkô	cake
2	Proto-Indo-European	gōg-	round, ball-shaped object; lump; clump

kuoko — Etymology, Origin & Word History | Etymology Explorer