I have a Thomas Killian that was born in Mississippi in 1870. His father, I think is Houston Kelliam as he married a Louisa Harris June 18 1869. I think, he also had a sister that was born around 1874 (?) named Hussie she ended up marrying a Carroll I don't know if this is your Thomas or not I am trying to tie him and them to my g-gfthr Walter E Harris. Hope this helps. Thank you