This is Stephan Bibrowski better known as Lionel the Lion-Faced Man. He was a famous sideshow performer who lived from 1891–1932. His whole body was covered with long hair that gave him the appearance of a lion.
Bibrowski was born in Warsaw in Poland with one-inch hair covering his body. His mother blamed the condition on the mauling of his father by a lion, which she witnessed while pregnant with Stephan. Although its likely that this was a made up story.