Where does “Bumboiu” come from?

Bumboiu (Romanian) comes from Romanian Bumbu, from Romanian bumb, from Hungarian gömb, from Greek κόμβος, from Ancient Greek κόμβος — roll, band, girth.

Ancestry of “Bumboiu”, step by step

Step	Language	Word	Meaning
1	Romanian	Bumbu	—
2	Romanian	bumb	button
3	Hungarian	gömb	sphere
4	Greek	κόμβος	interchange, hub, circus; knot; node
5	Ancient Greek	κόμβος	roll, band, girth

Every word from Ancient Greek κόμβος →Every word from Greek κόμβος →Every word from Hungarian gömb →