This might be the marriage record of his parents? And a census?
Georgia, County Marriages, 1785-1950, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KXJV-3PJ), Jeremiah Nix and Fanny Webb, 25 Oct 1810; citing Marriage, Elbert, Georgia, United States, county courthouses, Georgia; FHL microfilm 209,538.
||25 Oct 1810|
||, Elbert, Georgia|
United States Census, 1820 Christian, Elbert, Georgia
United States Census, 1820, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHLW-6QL), Jeremiah Nix, 1820.