I did not find any of your names on the 1850 Census. But there are several Keller listed in a book I have "Missouri birth and death records" I will list the first name and see if you connect and then you can tell me and I will give you what is there: Keller Ella Hearald Francis Hannah J Harrison James m Janice Lee John George John L. Leonard Mary C. Mary L. Mes Isabel Peter S.C. Thomas J Vance Webester Most of the Keller are from Bent Co and some from Bate Co Mo Hopes this helps