Rachel Blackford was born Abt. 1770, and died 1797 in Columbia, Hamilton County, OHIO.She married Betheul Covault on December 29, 1790 in Columbia , Hamilton County, OHIO, son of Abraham Covault and Lois Pendleton. More About Rachel Blackford and Betheul Covault: Marriage: December 29, 1790, Columbia , Hamilton County, OHIO.