First Appearance of Superman

Superman (Kal-El, adopted as Clark Joseph Kent) Created by Jerry Siegel and Joe Shuster, Superman first appeared in Action Comics #1 (June 30, 1938)

First Appearance of Aquaman

Aquaman (Orin, adopted as Arthur Curry) Created by Mort Weisinger and Paul Norris, Aquaman first appeared in More Fun Comics # 73 (November 1941)