Daredevil's real name is Dave Jarrett. As a young boy, who was one of Captain America's biggest fans, and appeared to be the last normal human in the world. He was killed during a battle between heroes and the mutated population. The hero Nighthawk, following a vision, went to his grave and dug him up after realizing that the boy's power was regeneration. David then took the identity of Daredevil and became a member of a circus that operated on the west coast of the United States, and due to his inability to die, he soon became the star attraction, eventually gaining (at least) national acclaim. Daredevil was backed up by a group of mutated humans who later became members of the X-Men led by Mr. S (Scott Summers).
