Find a Grave, database and images (https://www.findagrave.com : accessed 20 January 2021), memorial page for Mary Margaret Biser Brandenburg (24 May 1801–27 Oct 1869), Find a Grave Memorial no. 21193868, citing Christ Reformed Cemetery, Middletown, Frederick County, Maryland, USA ; Maintained by Joseph Colin Clark (contributor 47094715) .
Biser-80 was created by Gary Smith through the import of Smith Family Tree-2.ged on Feb 7, 2015.
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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: