Sorry it has taken so long for me to get back to you.
Martin Luther who died in 1932 had 3 sons with Annie Sigmon; Leiter Thomas Pannell (born in 1926 and died in 2001), Martin Coleman Pannell (younger than Leiter although not sure of birth and is still living), and another son who I cannot remember his name.
My line comes from the Leiter Pannell line. Leiter Pannell married Lottie Lou Bost (born 1928, died 2006) and had one child, my father; Greg Thomas Pannell (born 1953, still living).
Greg Pannell married Rose Ann Murray (born 1953, still living), and they had 2 children; Adam Greg Pannell (born 1983, still living), and myself Maria Rozanne Pannell (born 1985 obviously still living).
That is all of the information I have as of yet, but hope to acquire more soon. Hope this helps