During World War II, some world's had a plethora of costumed crusaders, others had few or none. On Earths One and Two. Here is an example of two operating at the same time.
While Dare of Earth-One would become the grandfather of Ronald Raymond, who was himself the superhero known as Firestorm, there is no known connection between Wendell and Ronnie's counterpart of Rod Reilly, aka Firebrand. Although there may have been, given that Dare's older age from that of his twin.