Male Adoptee Born 4/22/1963 In Mpls,mn

I am helping my brother locate anyone in his family who will be willing to talk with him. He was born April 22, 1963 in Minneapolis, Mn. His birth mother has been found living in Tennesse, but refuses to speak with him. Her name is C Garmany. He also has a half sister whom he would like to speak with. His birth mother also adopted a son years after relinquishing my brother......anyone in Tn willing to help locate this person, please contact me for information. Anyone in Minnesota who thinks he may be related, please email me. I am desperate to give him anything from his birth family. Even just a 15 minute phone conversation would help.