Hamilton McKown Twombly Sr. (August 11, 1849 – January 11, 1910) was an American businessman.
Early life
Hamilton McKown Twombly Sr. was born on August 11, 1849, in Middlesex County, Massachusetts, and grew up in Boston. His parents were Alexander Hamilton Twombly (1804–1870) and Caroline (née McKown) Twombly (1821–1881). Twombly's siblings included Alexander Stevenson Twombly (1832–1907), Alice W. Twombly Jones (1848–1906), and Almina E. Twombly Sheldon (1851–1875). He attended and graduated from Harvard University in 1871.
Career
Twombly worked as a financial advisor to William Henry Vanderbilt (1821–1885), President of the New York Central Railroad. He sat on the Boards of Directors of the Chicago and Northwestern Railroad, the Delaware, Lackawanna and Western Railroad, the Chesapeake and Ohio Railroad, and the New Jersey Shore Line Railroad. He also sat on the Boards of Trustees of the Guarantee Trust Company and the Mutual Life Insurance Company.
In 1890, Abram Hewitt partnered with Edward Cooper and Hamilton M. Twombly in forming the American Sulphur Company. That company then entered into a 50/50 agreement with Herman Frasch and his partners to form the Union Sulphur Company
