Bertha Heyman (born c. 1851) was a 19th-century American criminal, also known as "Big Bertha" or the "Confidence Queen." She was described by famed New York City detective Thomas F.

Lou Blonger (May 13, 1849 – April 20, 1924), born Louis Herbert Belonger, was a Wild West saloonkeeper, gambling-house owner, and mine speculator, but is best known as the kingpin of an extensive ring of confidence tricksters that operated for more than 2

Carlo Pietro Giovanni Guglielmo Tebaldo Ponzi, (March 3, 1882 – January 18, 1949), commonly known as Charles Ponzi, was an Italian businessman and con artist in the U.S. and Canada.

William Thompson was an American criminal and con artist whose deceptions caused the term "confidence man" to be coined.