In this 1870 census it says John Bright was born in NC and Susannah b Ky. In the 1900 census for Joseph and Nancy it says her parents were born in NC and KY. It sounds like they are her parents. In 1875 Joseph and Nancy had Dora in Knox Co, Ky. In 1880 they had Dora and Ella. You could send for her death record to tell for sure. Or ask someone at RAOGK to do a lookup for you.