Does anyone have information on a William Duncan (b. 1847, TN) and family in household #15 on the 1870 District 11, Coffee TN census? The surname is recorded as 'Donkin' on this census form. The individual family members are:

William Duncan, b. 1847 TN
Mary Duncan, b. 1840 TN
Louisa Duncan, b. 1868 TN
Perry Duncan, b. 1869 TN
(Also in this household is Auston(Newton?) BLANTON, b. 1847 TN)

I believe this is the same William Duncan and family appearing on the 1880 Precinct 7 Ellis TX census:
William (widower), b. 1847 TN
Louisa (daughter), b. 1868 TN
Perry (son), b. 1870 TN
Elizabeth (daughter), b. 1872 TN
Texana (daughter), b. 1874 TN

Thank you for any information you can share.