John, I dont know all the answers you are seeking about Austin Pigg, but here is what I found on the Internet.
Austin was born 12/19/1835 in Chesterfield Co., S.C. and on 2/9/1860 married Mary Ann Collins in Harris Co., Ga. and they had 8 children: Marietta, Jennie, Adaline, Katie, Pauline, Lila, Laura Julia, and Emma. The children were all born in Harris Co., except Pauline, Lila, Laura, and Emma, who were born in Ala. (Chambers Co.)
Austin's parents were Erasmus Pigg (b. ca 1805 in S.C.) and "Eliza" (b. ca 1813 in S.C.). They married circa 1832, probably in Chesterfield Co. They had the following children: William, Austin, Emaline, James Tillman, Tillie (Matilda), Joseph, Martha June, and Mary A. About 1851-52 Erasmus and Eliza moved their family to Harris Co., Ga.