What I have found on Newton O'Guin is this: 1850 Perry County, TN listed as Newton O'Guin, born 1835, TN. Son of David O'Guin, born 1805, SC, and Mary, born 1810, birthplace unreadable. Siblings are Tray?, 1833, TN, Solomon, 1837, TN, Sarah, 1839, TN, Rutha, 1847, TN and Mary D., 1850, TN. Looks like Mary could be a second wife and not the mother of the older children. Living with them is Nancy Ingram, 35, TN with Ann, John and James A. Ingram 1860 Perry County, TN listed as Newton Guin, born 1835, TN, farmer, with wife Manerva C., 1836, TN, and children Nancy J., 1856, TN and James A., 1859, TN. 1870 Perry County, TN listed as Newton O'Gwinn, born 1835, TN, carpenter, with James, 10, and John, 5, both born in TN. They are living in the household of Augustus Patry, 51, France, and Mary J., 36, TN. 1880 Perry County, TN James A. O'Guin, 21, TN, is a servant in the household of C. W. Ledbetter. I could not find Newton anywhere in 1880, which would probably be the most useful for you. At this moment Ancestry won't load 1900 Tennessee pages, which makes me hopeful that it will be searchable in the next few days. I did find him in 1910 in Henry County. On the 1891 voters registration there is a Newon Guin in Franklin and Grundy Counties, but that doesn't help much. Hope this is your guy. Peggy