American numismatists

John Jay Ford Jr. (March 5, 1924 – July 7, 2005) was an American numismatist from Hollywood, California, known for his extensive collection of historical currency and medals. Ford largely collected American coinage, particularly U.S. colonial coins, medals, and obsolete U.S. and colonial currency. Ford was one of the premier experts in the field of numismatics, and it is estimated that the total value of his numismatic holdings was upwards of $55 million at the time of his death.

Walter Henry Breen Jr. (September 5, 1928 – April 27, 1993) was an American numismatist, writer, and convicted child sex offender as well as the husband of author Marion Zimmer Bradley. He was known among coin collectors for writing Walter Breen's Complete Encyclopedia of U.S. and Colonial Coins. "Breen numbers", from his encyclopedia, are widely used to attribute varieties of coins. He was also known for activity in the science fiction fan community and for his writings in defense of pederasty as a NAMbLA activist.

William Herbert Sheldon, Jr. (November 19, 1898 – September 17, 1977) was an American psychologist, numismatist, and eugenicist. He created the field of somatotype and constitutional psychology that correlate body types with temperament, illustrated by his Ivy League nude posture photos.