Nancy
来自Big Physics
late 19th century: pet form of the given name Ann .
wiktionary
From Nancy, pet form of the female given names Agnes and Anne, under influence from earlier nan(“ serving girl, maid; male homosexual”), itself from Nan, another pet form of the same names. Compare Mary.
etymonline
Nancy
fem. proper name, probably a pet form of Ancy, diminutive of Middle English Annis "Agnes" (see Agnes). Among the top 10 popular names for girls born in U.S. between 1935 and 1955.
