Where does “botón” come from?

botón (Galician) comes from Old French bouton, from Vulgar Latin *bautōnem, from Frankish *bautō, from Proto-Germanic *bautan.

botón (Galician): button; bud; sucker

Definitions

Step	Language	Word	Meaning
1	Old French	bouton	—
2	Vulgar Latin	*bautōnem	—
3	Frankish	*bautō	—
4	Proto-Germanic	*bautan	—

botón — Etymology, Origin & Word History | Etymology Explorer