Katherine was born about 1851 and passed away about 1917
Sources
1875 New York, State Census, Lancaster, Erie, New York, United States
Find a Grave, database and images (https://www.findagrave.com/memorial/6041931/katherine-helwig: accessed 17 May 2023), memorial page for Katherine Helwig (14 Jan 1851–4 Jan 1917), Find a Grave Memorial ID 6041931, citing Elkland Township Cemetery, Cass City, Tuscola County, Michigan, USA; Maintained by SDL (contributor 47919392).
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DNA Connections
It may be possible to confirm family relationships with Katherine by comparing test results with other carriers of her 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 Katherine: