I believe Herman Cain is being attached to the wrong Luther Cain in this discussion.Here is the obituary of the Luther B Cain who died in 1998:
LUTHER B. 'BOB' CAIN JR.: Newspaper Obituary and Death Notice Commercial Appeal, The (Memphis, TN) - February 12, 1998 Deceased Name: LUTHER B. 'BOB' CAIN JR. LUTHER B. 'BOB' CAIN JR., 77, of 1486 Snowden, retired forklift operator for Choctaw, died of heart failure Monday at Memphis Veterans Medical Center. Services will be at 1 p.m. Saturday at Greater Bush Grove Church, where he was a member, with burial in Morning Grove Cemetery. Family Mortuary has charge. He was a World War II veteran. Mr. Cain, the husband of Evelyn Cain, also leaves six daughters, Barbara Wakefield, Linda McCrary, Karla Harris and Brenda Cain Mabone, all of Memphis, and Lois Williams and Rose Cain, both of Saginaw, Mich.; two sons, Rev. Cleveland Cain and Larry Cain, both of Memphis; four brothers, Willie Cain and Edelphus Cain, both of Memphis, Nesby Lee of Atlanta and Aaron Cain of Zion, Ill., 23 grandchildren and nine great-grandchildren.Edition: Final Page: A10 Copyright (c) 1998 The Commercial Appeal, Memphis, TN
Herman's only brother is Thurman. This Luther B Cain Jr has 6 daughters and 2 sons. This Luther is the son of Luther B Cain and Linnie Mae Miller.This can be seen in the census of 1930 where is listed with his family, including Edelphus and Willie, mentioned above.