Actor, "Gone with the Wind."

William Smith Clark (July 31, 1826 – March 9, 1886) was an American professor of chemistry, botany, and zoology; a colonel during the American Civil War; and a leader in agricultural education.

William Andrews Clark Sr. (January 8, 1839March 2, 1925) was an American entrepreneur, involved with mining, banking, and railroads, as well as a politician.

(July 6, 1825 or 1826 – November 6, 1889) a military veteran, businessman, and author in northern Mississippi.

William Patrick Clark Jr. (October 23, 1931August 10, 2013) was an American rancher, judge, and public servant who served under President Ronald Reagan as the deputy secretary of state from 1981 to 1982, United States national security advisor from 1982 to 1983, and the secretary of the interior from 1983 to 1985.

The William A. Clark House, nicknamed "Clark's Folly", was a mansion located at 962 Fifth Avenue on the northeast corner of its intersection with East 77th Street on the Upper East Side of Manhattan, New York City.