I did a little search for the Thomas's girls, but no luck census wise so far. I did find Nancy's marriage to John Keenum.John and Nancy were married 23 Jan 1881, Prentiss Co, MS. This appears to be them on the 1900 Colbert Co. census Tuscumbia 29 June 1900.
John 39 Birth May 1861 AL AL AL Nancy38'Aug 1861 MS GA AL Oscar18"Mar 1882 MS AL MS Effie15"Jan 1885 AL AL MS Westly11 "Mar 1889 AL AL MS Burnie 9 "July1890 AL AL MS Elmo5July1894 AL AL MS James3July1896 AL AL MS
You may already have this. I don't know who John is, the John in his 50's in Franklin AL has a John b 1839, so maybe he is a son of this John or one of his brothers. Was reading earlier that most girls nicknamed Franky were usally named Frances, so I will try that name. On this census Nancy states that she has had 8 children with 7 living. As there are 6 I guess one must have married or be living elsewhere on their own.