Name: Lex Luthor
Other Names: Luthor; Mockingbird
First Appearance: Action Comics (vol. 1) #23 (Apr. 1940): "Europe at War, Part 2"
Number of Appearances: 1,508
Comic Book Appearances: 1,212
TV, Film Appearances: 291
Video Game, Computer Game Appearances: 5
Foe of: Superman (arch-enemy)
Worked for: LexCorp
When Lex Luthor was first introduced in Action Comics #23 (Apr. 1940) he was indeed an arch-villain who was apparently bent on world domination. He was engaged in a plan to spread war throughout all Europe. But there were many differences between the character in his original appearance and the character as he is known today. As he first appeared, he had a full head of red hair. This version also was never given a first name. He was known simply as "Luthor."
Suggested links for further research about this character and the character's religious affiliation: