cognac (n.)youdaoicibaDictYouDict[cognac 词源字典]
1590s, Coniacke, "wine produced in Cognac," the region in western France. The sense of "brandy" is 1755, shortened from 17c. cognac brandy, which was distilled from cognac wine. The place name is from Medieval Latin Comniacum, from the personal name Cominius and the Gallo-Roman suffix -acum.[cognac etymology, cognac origin, 英语词源]