It looks like his father went by a number of names, after looking through census & death records. The same person is listed as Richard Dyre Tally Slatton, Dixson Slatton, D T Slatton, Dick Slatton, Dyre T Stattan & Dyori T Slatton on various census records. His father's obit can be found here:
: Obituary Index of the Greenville News. Greenville County Library System. http://www.greenvillelibrary.org/index.php/Obituary-Index.html: accessed 30 March 2013.