you may already know his parentage but in case not I have this information:
There is a marriage record for Clyde W Mathews to Elizabeth Oaks on 6/10/1932. His parents are listed as Robert Mathews and Rosa Stone and Elizabeth's parents are R F Oaks and Cynthia Craiger.
The marriage record for Robert and Rosa is listed as Robert Mathus, from Fayette W Va., and Rosa Stone, from Scott Co Va, married 11/9/1898. his parents are listed as Thomas and Jeanie Stone and hers are Samuel S and Nancy E Stone. I have this marriage certificate if you don't already have it.