The family includes the casino games of blackjack and pontoon as well as their domestic equivalents. Twenty-one, formerly known as vingt-un in Britain, France and America, is the name given to a family of popular card games of the gambling family, the progenitor of which is recorded in Spain in the early 17th century. Vingt-un, vingt-et-un, Siebzehn und Vier, Einundzwanzig
