I have info on the Hillermans and Adams family of Columbiana Co. I think they are the same as yours, but there are some discrepancies. My source is a copy of a letter written in 1932 concerning the genealogy of the Adams family.
George J. Hillerman(B. Spt 28, 1821) m. Mary Ann Adams(B. Jan 5, 1820). CH: Sarah A, Anna L., Josiah Adams, Lydia, Georgetta H, Fremont, Dayton, Mary Bell, and Kate R.
I don't know anything about George, but have some info on Mary Ann Adams.