Y'Mera Xebella Challa is a superheroine appearing in American comic books published by DC Comics. Created by Jack Miller and Nick Cardy, the character first appeared in Aquaman #11 (September 1963).[1
This is going off the debut of comic book characters. In the cases of characters who were introduced in other media originally and added to the comics canon later along (ex: Harley Quinn) it'll go by actual debut year.
