One additional piece of info. You probably know that Nancy and William are on the 1880 census. I have not seen the actual census record myself but the transcription online (see below) shows Susan A.'s name as "Sousan A". Do you think the transcription had a typo? Just curious. Susan would have been an older sister of John T.
1985 jones william 50 farming m.12/27/1849 t - -
(lamkins) nancy c 46 keeps house k - nc
sarah 21 dau at home k t k
George w 19 son at home k t k
sousan a 17 dau at home k t k
tennesse e 13 dau at home k t k
john t 10 son at home k t k