Here a few sources, do you have them? Are they the right person?
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K75Q-71R : accessed 22 August 2016), Mary Belle Jones, Militia District 96, Washington, Georgia, United States; citing enumeration district (ED) 150-15, sheet 10A, family 198, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 721.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:3MW7-LMM : 8 December 2015), Marvin Lundy in entry for Basil M Lundy, 1930.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:3MYC-13Z : 8 December 2015), Marvin Lundy, 1930.
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCSF-9HH : 17 October 2014), Alexandre Lundy, Georgia, United States; citing p. 69, family 580, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,633.
Too many to list from the 1870 census.
GOOD LUCK.