SandraI have no idea if Mariah was Cherokee. William is the son of David Barnwell he was born about 1823 in Hall Co ,Georgia.David was born around 1790 in YorkCo,SC. He married Elizabeth Warden in 1794, died 5 Feb 1856 in Mississippi. They were parents of 10 issue; Eliza b 1814, Robert b 1815, David M.,b 1817 he marrRebecca Vines 15 Feb 1841,Sarah b 1821 married Samuel Thompson 13 July 1835, Elizabeth born 1821 marr Eleazer W. Harris 29 June 1843, Cynthia b 1823 mar. William Watkins 31 Jan 1843, William, Nancy b 1828,Harvey J b 1830 ,John Thomas b Mar 1833 marr Emily Bachus 16Feb 1851.David was the son of Robert M Barnhill Sr. (Barnwell).