This is From Ancestry.Com. Hope it all copied ok. Someone has a family tree. Don't know if the information is correct or not. I found a picture of Richard,Pearl,Cyntha, & David Southern. I didn't know if they are your family. If you have Ancestry you can find it under Lewis family tree. Hope this helps. Didn't find them buried in two major cemeteries in Wagoner.

Richard Hardy Southern
Birth Aug 1873 Oklahoma City, Oklahoma, Oklahoma, US
Death Jan 1939 Oklahoma City, Oklahoma, Oklahoma, United States

Wife
Minerva Ann Huffines
Birth 1880 Arkansas, United States
Death Alco, Stone, Arkansas, United States

Son
McKinnley Southern
Birth 27 Jan 1898
Died 15 Jul 1988

Wife of Son

Burnice Lee
Birth 25 Mar 1911 in Stone, Arkansas, United States
Death 1972 in Mountain View, Stone, Arkansas, United States

Social Security Death Index
about McKinley Southern

Name: McKinley Southern
SSN: 432-40-4621
Last Residence:
72560 Mountain View, Stone, Arkansas, US
Born: 25 Jan 1898
Died: 15 Jul 1988
State (Year) SSN issued:
Arkansas (Before 1951)