William Frank Buckley Sr. (July 11, 1881 – October 5, 1958) was an American lawyer and oil developer. He became influential in Mexican politics during the military dictatorship of Victoriano Huerta but was later expelled when Álvaro Obregón became president. He became wealthy due to his interests in oil exploration and speculation. Buckley was the father of ten children, including William F. Buckley Jr., the author and founder of National Review magazine, and of James L. Buckley, a U.S. Senator from New York (1971–1977). He was the grandfather of Christopher Buckley, an author and humorist.