"Illinois Births and Christenings, 1824-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V2LV-56F : 12 December 2014), William Edwin Elliott in entry for Leah Floss Elliott, 04 Jun 1885; Birth, citing Kane, Illinois; FHL microfilm
"Illinois, County Marriages, 1810-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KF28-CNC : 3 March 2016), Harold A Dolph and Leah Floss Elliott, 11 Feb 1907; citing Kane, Illinois, United States, county offices, Illinois; FHL microfilm 1,480,776.
It may be possible to confirm family relationships with Leah 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 DNA with Leah: