I strongly suspect we are researching the same Langsdon line. My ggg grand mother was Demaris Langsdon, daughter of Royal Langsdon. She married my ggg grandfather T.C. (Tekel) Tanner Aug. 22, 1830 in Louisville, Jeff. Co., Ky. Royal and Charles_appear_ to be related (I suspect they are brothers), however all I really have are census records. Charles' and Royal's families move with one another in the 1810, 1820 and 1830 census.