Being a close cousin to Polly is assumed by shared last name and same town of marriage.
Sources
See also:
1810 United States Federal Census
1820 United States Federal Census
Virginia, Compiled Marriages, 1740-1850
Virginia, Select Marriages, 1785-1940
"Public Member Trees", database, Ancestry.com (accessed 29 January 2017), profile for George Crump.
Franklin County, Virginia, Marriage Bond Index, 1786-1858; Add alternate information; Report issue; Name: Geo. Crump; Gender: Male; Marriage Date: 23 Jul 1792; Marriage Place: Franklin, Virginia, USA; Spouse: Dyce Haynes; Page: page 67.
"Virginia Marriages, 1785-1940," database, FamilySearch (accessed 11 February 2018), George Crump and Dyce Haynes, 23 Jul 1792; citing Franklin County, Virginia, reference ; FHL microfilm 31,523.
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DNA Connections
It may be possible to confirm family relationships with George by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with George: