Yes, there were more of the Frech family in Clarksville. Conrad/Margaret were living next door to your Geo. Jacob on the 1870 census. Conrad died in 1874 and Margaret in 1884.
Peter (my 2nd ggrandfather) lived in Clarksville. He married Emily Langston, the sister of your Rebecca Langston. The Langstons came from KY. Wm. Langston, father of girls, ran a grocery store there.
Peter had another brother named Henry, that lived there and married Amanda Byrne. He ran a store also. They had 6 children, only 1, which was a female survived to adulthood.