chairman (n.)youdaoicibaDictYouDict[chairman 词源字典]
1650s, "occupier of a chair of authority," from chair (n.) + man (n.). Meaning "member of a corporate body chosen to preside at meetings" is from c. 1730. Chairwoman in this sense first attested 1752; chairperson 1971.[chairman etymology, chairman origin, 英语词源]