Where does “castaño” come from?

castaño (Spanish) comes from Latin castaneus, from Latin -eus, from Ancient Greek -εῖος, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

castaño (Spanish): brown; chestnut

Definitions

brown; chestnut

Ancestry of “castaño”, step by step

Step	Language	Word	Meaning
1	Latin	castaneus	chestnut; brown
2	Latin	-eus	argentum + API → argenteus; ferrum + API →...
3	Ancient Greek	-εῖος	Forms adjectives, usually with a meaning of "of"...
4	Proto-Indo-European	-iHwós	—
5	Proto-Indo-European	-wós	Creates adjectives from verb stems

Words derived from “castaño”

castañar
dorsicastaño
kastanyo

Every word from Proto-Indo-European -wós →Every word from Latin -eus →Every word from Ancient Greek -εῖος →