The Germanna Record, No. 13 - The Blankenbaker, Weaver, and Wilhoit Families, The Memorial Foundation of the Germanna Colonies, Inc., Publishers, 2006
Wilhite/Wilhoit & Allied Descendants of Johann Michael and Anna Maria (Hengsteler) Wilheit 1671-1994 Compiled by Mary F. Mickey
"Virginia, Marriages, 1785-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XRHJ-R9X : accessed 15 October 2015), William Wilhoit and Anna Clore, 28 Oct 1787; citing Culpeper, Virginia, reference P 92; FHL microfilm 30,927.
National Archives ID 654491 - Carded Records Showing Military Service of Soldiers Who Served in Volunteer Units During the Post-Revolutionary War Period, compiled 1899 - 1927, documenting the period 1784 - 1811 
It may be possible to confirm family relationships with William by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: