William Greyer Coop (February 26, 1805 – June 4, 1874) was an American farmer and settler from Illinois and Iowa, who served as a colonel of the militia, a sheriff and a member of the legislatures of Iowa Territory and the State of Iowa.Fulton, A. R. "Memoir of Col. William G. Coop." The Annals of Iowa Vol. 1, No. 3 (1882), pp. 73-80 He was born in Greene County, Virginia, and successively lived in Tennessee, Washington County, Pennsylvania, Wabash County, Indiana, and Macoupin County, Illinois, where he was county sheriff, before moving to Iowa.
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