Bearnaise (n.)youdaoicibaDictYouDict[Bearnaise 词源字典]
"egg-and-butter sauce," 1877, from French sauce béarnaise, from fem. of béarnais "of Béarn," region in southwest France (named for the Benarni, a Gaulish tribe).[Bearnaise etymology, Bearnaise origin, 英语词源]