Donald Hiss (December 15, 1906 – May 18, 1989), also known as "Donie" and "Donnie", was the younger brother of Alger Hiss. Donald Hiss's name was mentioned during the 1948 hearings wherein his more famous and older brother, Alger, was accused of spying for the Soviet Union, and two years later convicted of perjury before the House Un-American Activities Committee (HUAC).