Where does “castan” come from?

castan (Welsh) comes from Middle Welsh kastan, from Latin castanea, from Ancient Greek καστάνεια, from Ancient Greek κᾰ́στᾰνᾰ — sweet chestnuts; chestnut.

castan (Welsh): chestnut

Definitions

chestnut

Ancestry of “castan”, step by step

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

Words derived from “castan”

castanwydd
castanwydden

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