I am the 2 x great grandaughter of Charles Killin b. 1793 Pennsylvania. He was married I beleive 3 times. His last wife's name was Thirsa b. 1812(Thursa, Arthursa, Thirza, Theresa?) was my 2 x great grandmother. They both died in Fillmore, Andrew County, Missouri. Their daughter Dora was my great grandmother. I have quite a bit of information on my branch of the family just not much on Charles and Thirsa Killin's ancestors. Thirsa may have been born in Ohio or Pennsylvania. I think she was a school teacher. Possible last names are Cox, Sims, and Simmons. Please feel free to email me direct pjbpjbpjb@aol.com