Eponymous name

From The Cambridge Encyclopedia of The English Language by David Crystal. Page 155.

A list of eponymous names (such as alsatian derived from Alsace, France) which I either did not know or had forgotten.

copper - Cyprus

currant - Corinth, Greece

denim - Nimes, France

duffel coat - Duffel, Antwerp

gauze - Gaza, Egypt

jeans - Genoa, Italy

kaolin - Kao-ling, China

mayonnaise - Mahon, Minorca

pheasant - Phasis, Georgia

pistol - Pistolia, Italy

suede - Sweden