Bertha passed away on 24 October 1951 and is buried in Tenney Hill Cemetery in Casco, Maine.
"Maine Vital Records, 1670-1921," database with images, FamilySearch ( : 13 March 2018), Wilbur F Tenney and Bertha M Cook, Marriage 03 Jul 1916; citing Division of Vital Statistics, State Board of Health, Augusta; FHL microfilm 10,199.
It may be possible to confirm family relationships with Bertha 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 DNA with Bertha: