Dollar princess

Dollar princesses (sometimes known as "dollar duchesses") were wealthy American women of the late 19th and early 20th centuries who married into titled European families, exchanging wealth for prestige. They were often the daughters of nouveau riche industrialists whose families wanted to gain social standing. The term was also used occasionally in the Danish press for any woman of means marrying into a titled family.

According to a book called Titled Americans (1915), there were 454 marriages between Gilded Age and Progressive Era American women and European aristocrats. The Library of Congress claimed in a reference guide that "American heiresses married more than a third of the House of Lords". The Spectator claims that among the marriages were 102 "British aristocrats", including "six dukes".