I think it's a great theory!Did Joseph Thomason leave a will?The Civil War Pension is strong evidence. Nancy, living with her older brother makes a lot of sense. C.C. Tiffee married Bartlett's daughter, Margaret after Nancy died. That would've made Margaret Nancy's niece. If Joseph didn't leave a will, sometimes a distribution of land can be found if he owned any and names of his children would be listed there. Where was the 1850 census that had Joseph with a daughter named Nancy? She had listed SC as her birthplace on other census records. I'd love to know where in SC this family might have originated. I'm excited about this possibility!