He was the Executor of his father's estate in 1782, one of the children who was over 21 years old.
In the Caswell Co. Marriage Bond book, William Duty married Rachel Warren on 13 Feb 1783.
From Converging Paths - one of their sons, Joseph, married Polly Fitch in Caswell Co., 18 Mar 1826, their son WIlliam F. Dutty emigrated to Texas.
Sources
Will of Matthew Duty. Caswell Co., NC, WB A, pp. 215-216, written 4 Jun 1782, proved Sep Court 1782. Digital image at Ancestry.com - https://preview.tinyurl.com/y7e5votz
McKinney, Thelma D. Converging Paths, 1972, pg 39-40
"North Carolina, County Marriages, 1762-1979 ," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QPS9-D69C : 16 January 2021), William Duty and Rachel Warren, 13 Feb 1783; citing Caswell, North Carolina, United States, p. , North Carolina State Archives Division of Archives and History; FHL microfilm .
Acknowledgements
WikiTree profile Duty-27 created through the import of McDonald Family Tree_Wiki_2011-05-28.ged on May 29, 2011 by HB McDonald.
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DNA Connections
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.
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 William: