When did the father of George J. Gruen pass away ?
George J. Gruen George J. Gruen (1877–1953) was an American watchmaker who managed the Gruen Watch Co. He was the second son of the founder Dietrich Gruen.
John E. McMahon Major General John Eugene McMahon (December 8, 1860 – January 28, 1920) was a U.S. Army general. He was the father of World War II general, John E. McMahon Jr.