BismarckyoudaoicibaDictYouDict[Bismarck 词源字典]
"drink of champagne and stout" (also called a black velvet), 1910, named for the German chancellor (1815-1898), who was said to have been fond of it. The surname is said to be short for Biscofsmark "bishop's boundary."[Bismarck etymology, Bismarck origin, 英语词源]