Jacob Dyneley Beam (March 24, 1908 – August 16, 1993) was an American diplomat.Beam was born in Princeton, New Jersey. His father was a German professor at Princeton University, and the younger Beam earned a bachelor's degree in 1929 from Princeton. He then joined the United States Foreign Service.His first assignment was in Geneva, where he monitored the League of Nations and served as vice counsel in Geneva from 1931 to 1934.