Mary was born in 1910. She was the daughter of Warren Blaney and Edith Pontbriand. She passed away in April 1938 of tuberculosis.
Sources
1930 U.S. Federal Census; Chazy, NY
New York, State Census, 1915; Chazy
New York, State Census, 1925; Chazy
Jonathan Waterbury genealogy : ancestry and some of the descendants of Jonathan Waterbury of Nassau, New York (1766-1825); p174
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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: