William Barron Hilton was an American business magnate, philanthropist and sportsman. The second son and successor of hotelier Conrad Hilton, he was the chairman, president and chief executive officer of Hilton Hotels Corporation and chairman emeritus of the Conrad N. Hilton Foundation. Hilton, a notable pilot and outdoorsman, was also a founder of the American Football League as the original owner of the Los Angeles Chargers, and helped forge the merger with the National Football League that created the Super Bowl. Like his father before him, he pledged 97 percent of his wealth to the humanitarian work of the Conrad N. Hilton Foundation. At the time, the gift was projected to increase the foundation's endowment from $2.9 billion to $6.3 billion, and will make his estate the organization's most significant donor.