The Mansel Adair that is listed on the 1850 census for Waldran Co., Arkanas is 58 years old placing his birth as 1792 in South Carolina. His wife's name is Nancy also 58 years old born in Georgia. Their children are: 1) Tellman b. 1831 in Illinois. 2) Margaret b. 1832 in Illinois. 3) James b. 1835 in Illinois. 4) Nancy b. 1839 in Illinois. 5) ?Thomas? b. 1841 in Missouri.
I beleive this is the same Mansel that is on the 1820 census in Trigg Co., Ky. and on the 1825 Clinton Co., Illinois census.
The name Mansel-Mancel appears in the extended family of Governor Adair of Kentucky. There is one whos middle name is Mansel whos family had moved to Louisiana.