Who is Scout Finch? What is her real name and why is her nickname "Scout"?

Scout's real name is Jean Louise Finch, she is six years old at the start of the novel. Her father is Atticus Finch, and she has a brother named Jem. The reason for her nickname is not revealed, although, we can infer that she got the name because of her innate curiousity and tendency to question everything around her.