I would start by checking to see if I could find a marriage record for Harry in Morgan County, WV. He may have listed his parents names on the marriage license application. It would appear the marriage occurred about 1916. The clerk at the courthouse should be able to tell you what information was asked on marriage licenses about that time and how to obtain a copy.
With all the different name variations and dates involved I'm not sure how you have connected the Harry Hays in Monroe County, PA with the Harry Hays in WV.