I Belive my Grandfather is your Uncle, Ervin Chinn Jr. I think you have the spelling wrong it would be Ervin not Irwin. He's parents were Ervin and Leona Chinn. Ervin's parents were Ed and Annie (maiden name Smith) So would your mom be my great aunt? Also do you know who Nannie Millard is? I know she married Ervin Chinn Sr. Is Leona and Nannie the same person? I hoped I helped.