because
Herbert Hover was not a president, Herbert Hoover was.
Dow Hover died in 1990.
Robert Hover died on February 15, 2013, in Warren, Rhode Island, USA.
Herbert Clark Hoover is the full name of the United States 31 president and the 3rd Untied States Secretary of Commerce. He was also a Quaker and the only president from Iowa.
HOvering cut down on food consumption "food will win the war"
Herbert Shutt died in 1922.
Herbert Avram died in 2006.
Herbert Molony died in 1939.
Herbert Ditty died in 1998.
Herbert Michaelis died in 1939.
Herbert Turner died in 1968.
Herbert Metcalfe died in 1943.