Dora Ghertner’s parents discovered

In 1920, the US Census in Nashville, Tennessee includes Lewis (age 62) and Dena (age 65) Cooper, as in-laws living in the home of my grandmother Dora Cooper Ghertner and grandfather Simon Ghertner at 1702 Ashwood Avenue, in Nashville, Tennessee. Lewis and Dena Cooper were naturalized US citizens (Lewis in 1887), having emigrated to the United States in 1885; had both been born in Russia so they spoke Russian; Lewis was a furniture merchant.  I think Dena and Lewis were Dora Ella Cooper’s parents and therefore my Great Grandparents.