Where does “pulga” come from?

pulga (Galician) comes from Old Portuguese pulga, from Vulgar Latin pulica, from Latin pūlex, from Proto-Indo-European *plus-.

pulga (Galician): flea

Definitions

Step	Language	Word	Meaning
1	Old Portuguese	pulga	—
2	Vulgar Latin	pulica	flea
3	Latin	pūlex	—
4	Proto-Indo-European	*plus-	—

pulga — Etymology, Origin & Word History | Etymology Explorer