Robin Hood

Robin Hood is the famous hero from English folklore. He was one of the earliest known superheroes in history, who stole from the rich, greedy men of his day and gave to the poor. Whether or not he actually existed is left to speculation but nevertheless many modern superheroes were inspired by him, including Green Arrow and Robin Hood.

A very young Bruce Wayne even saw a film that was based on the character when he was a child, right before his parents were killed in Crime Alley. The film was very likely a strong influence for him becoming the Batman as well.