Where does “castaña” come from?

castaña (Galician) comes from Old Portuguese castanna, from Latin castanea, from Ancient Greek καστάνεια, from Ancient Greek κᾰ́στᾰνᾰ — sweet chestnuts; chestnut.

castaña (Galician): chestnut; feminine singular of castaño

Definitions

chestnut; feminine singular of castaño

Ancestry of “castaña”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	castanna	—
2	Latin	castanea	a chestnut tree; a chestnut
3	Ancient Greek	καστάνεια	Alternative form of κᾰ́στᾰνᾰ; chestnut
4	Ancient Greek	κᾰ́στᾰνᾰ	sweet chestnuts; chestnut

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