NancyyoudaoicibaDictYouDict[Nancy 词源字典]
fem. proper name, probably a pet form of Ancy, diminutive of Middle English Annis "Agnes" (see Agnes). As an adjective meaning "effeminate" (with reference to men) it is from 1904. Among the top 10 popular names for girls born in U.S. between 1935 and 1955.[Nancy etymology, Nancy origin, 英语词源]