Death Certificate: Jacob L. Harkness, 28 Nov 1943. “Pennsylvania, U.S., Death Certificates, 1906-1970”. Ancestry.
Find a Grave, database and images (https://www.findagrave.com/memorial/90933318/jacob_leon-harkness: accessed March 9, 2024), memorial page for Jacob Leon Harkness (20 Jun 1892–28 Nov 1943), Find a Grave Memorial ID 90933318, citing Homewood Cemetery, Pittsburgh, Allegheny County, Pennsylvania, USA; Maintained by Graves (contributor 47171280).
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DNA Connections
It may be possible to confirm family relationships with Jacob by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Jacob: