My grandmother was Eva Lena Clemens Joplin. Her father was Edwin J Clemens b.1869 in Arkansas, d. c.1940; married to Ada Bell Rosson Clemens, b. Jan. 28, 1880?, in Tennesssee, d. May 3, 1947. Their other children were Emma S., Lela M., Virginia, Edna B., Ben T., Arnold and Donald. I cannot find who Edwin's parents were. My mother, who did a lot of family genealogy, said she thought that Samuel Clemens was, ie, a 6th great uncle, or such, but I cannot find any of her notes about this family.