Karoly Hajdu (1920-1981) was a Hungarian-born impostor turned fringe evolutionary theorist. Born near Budapest in 1920, Hajdu in the wake of World War II moved to England, and in 1948 began to use the name Baron Carl Hajdu. In 1956 he collected money for Hungarian freedom fighters resisting the then Soviet occupation but, it was later revealed, had pocketed all the proceeds. Hajdu was sentenced for fraud in 1957, and was duly forced into bankruptcy.