Mary was born in 1862. She was the daughter of Michael Duggan and Mary Ralls. She passed away in 1866.
Sources
Memorial: Find a Grave (no image) Find A Grave: Memorial #22253271 (accessed 10 October 2022) Memorial page for Mary Ann Duggan Duggan (2 May 1862-15 Mar 1866), citing Overturf Cemetery, Polk County, Arkansas, USA; Maintained by Monica Ann Heying Schafer (contributor 46782757).
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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: