Where does “chopo” come from?

chopo (Spanish) comes from Vulgar Latin ploppus, from Latin pōpulus, from Proto-Italic poplos — army.

chopo (Spanish): black poplar

Definitions

Step	Language	Word	Meaning
1	Vulgar Latin	ploppus	poplar tree
2	Latin	pōpulus	—
3	Proto-Italic	poplos	army

chopo — Etymology, Origin & Word History | Etymology Explorer