Mary was born in 1784. She was the daughter of Joseph Pierson and Sarah Sizer. Mary was married to Ichabod Smith Spencer in 1801 at Alford, Berkshire County, MA. She passed away about 1865.
Sources
Find a Grave, database and images (accessed 23 December 2020), memorial page for Mary “Polly” Pierson Spencer (5 Mar 1784–19 Feb 1865),Find A Grave: Memorial #207636836, citing Forest Hill Cemetery, Utica, Oneida County, New York, USA ; Maintained by PaPasgirl (contributor 48623246) .
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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: