Your Martha Todd Lanham who m. Norval T. Lanham was the daughter of my g-g grandparents, Andrew Todd and Millie Ann Layton. Martha's sister Susan m. Norval's brother, Samuel Lanham on 3 May 1849 in Jeff. Co, IN. They were there on the 1850 census but I could never find them after that. I was glad to find the info on Martha that you submitted.
Andrew Todd was b. in County Antrim, Ire. in 1795. He came to SC in 1810. He marr. Millie in Garrard Co., KY 28 Apr 1818. Millie, b. abt. 1795, probably in Spartanburg, SC, was the dau. of Stephen Layton and Martha Anderson. After Stephen d. abt. 1810, Martha went with several of her children to Garrard Co. She is bur. there. Andrew d. in Milton Township, Jeff Co. 2 Nov 1851. Millie d. 6 Feb 1852. They are both bur. in the Manville Church Cemetery in Milton Tsp.
Besides Susan, b. 1819 KY, and Martha, b. in 1837 in IN, there were John Layton Todd, b. 1821 KY, Francis C. Todd, 1822, IN, Thomas J. Todd, 1824, IN, Albert Todd, 1827, IN,James William, 1828, IN (my g-grandpa), Mary Ann 1833, IN, and Andrew Jackson Todd, 1834, IN.