Where does “castañero” come from?

castañero (Spanish) comes from Spanish castaña, from Russian кашта́н, from Polish kasztan, from Latin castanea, from Ancient Greek καστάνεια, from Ancient Greek κᾰ́στᾰνᾰ — sweet chestnuts; chestnut.

castañero (Spanish): chestnut-seller

Definitions

chestnut-seller

Ancestry of “castañero”, step by step

Step	Language	Word	Meaning
1	Spanish	castaña	chestnut; strike, wallop; bun, chignon
2	Russian	кашта́н	chestnut
3	Polish	kasztan	chestnut tree, tree of genus "Castanea";...
4	Latin	castanea	a chestnut tree; a chestnut
5	Ancient Greek	καστάνεια	Alternative form of κᾰ́στᾰνᾰ; chestnut
6	Ancient Greek	κᾰ́στᾰνᾰ	sweet chestnuts; chestnut

Every word from Ancient Greek κᾰ́στᾰνᾰ →Every word from Ancient Greek καστάνεια →Every word from Latin castanea →