The story
- Ancient Greekκᾰ́στᾰνᾰ (kắstănă)
- Latincastanea
- Old Frenchchastaigne
- Latincastanea
- Proto-West Germanic*kastannjā
- Old Englishċisten
- Middle Englishchesteyne
- English todaychesten
Inherited from Middle English chesteyne. Akin to Old High German chestinna ("chestnut"; > German dialectal Keste).
Etymology from Wiktionary, CC BY-SA 4.0.