Yves Chaudron
Yves Chaudron was a supposed French master art forger who is alleged to have copied images of Leonardo da Vinci's Mona Lisa as part of Eduardo de Valfierno's famous 1911 Mona Lisa painting theft. In reality he may be a fictional character created by Karl Decker for an article that ran in a 1932 issue of the Saturday Evening Post, and passed off as a real person.