Thomas Joseph Clancy (29 October 1924 – 7 November 1990) was a member of the Irish folk group the Clancy Brothers. He had the most powerful voice of the brothers and had previously been an actor in numerous stage productions, appearing with Orson Welles in King Lear. He also performed often on television and occasionally in the movies. Wikipedia
Thomas Leo Clancy Jr. (April 12, 1947 – October 1, 2013) was an American novelist. He is best known for his technically detailed espionage and military-science storylines set during and after the Cold War. Seventeen of his novels have been bestsellers and more than 100 million copies of his books have been sold. His name was also used on screenplays written by ghostwriters, nonfiction books on military subjects occasionally with co-authors, and video games. He was a part-owner of his hometown Major League Baseball team, the Baltimore Orioles, and vice-chairman of their community activities and public affairs committees. Wikipedia