William H. Bonney
(born William Henry McCarty, Jr. c. November 23, 1859 â€“ c. July 14, 1881),
better known as Billy the Kid and also known as William Antrim, was a 19th-century gunman who participated in the Lincoln County War and became a frontier outlaw in the American Old West. According to legend, he killed 21 men, but it is generally believed that he killed 8 people. He killed his first man in April 1 1877 at the age of 18.