I am searching to find the names the parents or relatives of Glen Ervin D.O.B. 07/16/1916Leachville, Arkansas and D.O.D. 12/27/1993 Mangum, Oklahoma.I am trying to research this family line for my adult sons.Mr. Glen Ervin was their biological paternal grandfather.The only information I can find is the social security death index. Any information would be greatly appreciated. Thanks.