Mary was born in 1763. She was the daughter of Jessie Corwin and Kasiah Case. She passed away in 1790.
Sources
The Corwin Genealogy (Curwin, Curwen, Corwine) in the United States. Ancestry.com Operations, Inc., Provo, UT, USA 2005
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DNA Connections
It may be possible to confirm family relationships with Mary by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Mary: