Alan "Doc" Ackerman Beetle (8 June 1913 in Princeton, New Jersey – 27 March 2003 in Riverton, Wyoming) was an American agrostologist and botanist. He was a professor of the University of Wyoming College of Agriculture in Laramie. Beetle adopted both surnames of his parents (Ralph Dennison Beetle and Helen Maria Ackerman). He was married to botanist and malacologist , née Schoof (1918–2005), from whom he was divorced in 1963. They had two children, Howie and Karen. They also adopted a third child, John.