Clair Family-IL, Ia

Looking for connections to the Clair family
Ben Clair married Martha both born in Warsaw, IL and relocated to Keokuk, Iowa area they had three daughter Jenny Myrtle b 1874-1962, who married Charles R. Van Ausdall, Jessie Mae married Henry Louis Meyers, and Anna who married August Engler also we know there was a David a witness on a marriage license. Any help would be appreciated. Peg