Wikipedia
Amazing-Man is the name used by four fictional characters published by DC Comics. The first three are African-American superheroes and are members of the same family. The first Amazing-Man debuted in All-Star Squadron #23 (July 1983), and was created by Roy Thomas and Jerry Ordway. The second Amazing-Man debuted in Justice League America #86 (March 1994), and was created by Dan Vado and Marc Campos. The third Amazing-Man debuted in Justice Society of America (vol. 3) #12 (March 2008), and was created by Geoff Johns and Dale Eaglesham. The fourth Amazing Man debuted in OMAC (vol. 3) #2 (December 2011), and was created by Dan DiDio and Keith Giffen.
Amazing-Man (John Aman) is a fictional, American comic book superhero whose adventures were published by Centaur Publications during the 1930s to 1940s in the Golden Age of Comic Books. Historians credit his creation variously to writer-artist Bill Everett or to Everett together with Centaur art director Lloyd Jacquet. Amazing-Man first appeared in Amazing-Man Comics #5 (Sept. 1939)
The character influenced the creation and origin of Charlton Comics' 1960s superhero Peter Cannon, Thunderbolt, as well as Marvel Comics' Iron Fist character in the 1970s.