By what familiar name are Robert Leroy Parks and Harry Longbaugh known?

Robert Leroy Parks is better known as Butch Cassidy, while Harry Longbaugh is famously known as the Sundance Kid. They were notorious American outlaws and partners in crime during the late 19th century, known for their bank and train robberies. Their exploits became legendary, especially through the film "Butch Cassidy and the Sundance Kid."