Much of that information is included here:
"Find A Grave Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVLB-KJ4J
: 11 July 2016), Mary Breazeale Brown, 1905; Burial, Pickens, Pickens, South Carolina, United States of America, Brown Family Cemetery; citing record ID 107211085, Find a Grave, http://www.findagrave.com
Son's death record names parents:
"South Carolina Deaths, 1915-1965," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N927-JG6
: 18 April 2016), Mary Brezeale in entry for R.B. Brown, 17 Sep 1934; citing , Brown, R.B., 1934, Department of Archives and History, State Records Center, Columbia; FHL microfilm 1,943,808.
Finding census records will take some time due to the common surname BROWN! Hope this helps. -NGP