ETYM French.
A kind of French brandy, so called from the town of Cognac.

A district in France known for its high quality grape brandy, also called cognac.
Town in Charente département, France, 40 km/25 mi W of Angoulęme; Situated in a vine-growing district, Cognac has given its name to a brandy. Bottles, corks, barrels, and crates are manufactured here.