Where does “kastanj” come from?

kastanj (Swedish) comes from German Kastanie, from Italian castagna, from Spanish castaña, from Russian кашта́н, from Polish kasztan, from Latin castanea, from Ancient Greek καστάνεια, from Ancient Greek κᾰ́στᾰνᾰ — sweet chestnuts; chestnut.

kastanj (Swedish): chestnut

Definitions

chestnut

Ancestry of “kastanj”, step by step

kastanj traces back through two separate lines of ancestry.

via German Kastanie

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

via Old French chastaigne

Step	Language	Word	Meaning
1	Old French	chastaigne	chestnut
2	Old English	ċisten	chestnut

Words derived from “kastanj”

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