↑ Find A Grave, database and images (https://www.findagrave.com : accessed 22 April 2018), memorial page for Clara Williamson (30 May 1856–20 Apr 1921), Find A Grave Memorial no. 100720844, citing Evergreen Cemetery, Chester, Randolph County, Illinois, USA ; Maintained by DaWaRa (contributor 47075731) . 
It may be possible to confirm family relationships with Clara 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 Clara: