I have been studying the TN Ozment families who went to TX. I found the one you are talking about and have not yet found Samuel N Ozment's parents. He died in TX and was born 1841, according to familysearch pilot. http://search.labs.familysearch.org/recordsearch/start.html#p=0http://search.labs.familysearch.org/recordsearch/start.html#p=0
I found that family in KY in 1880 and in TX in 1900.
1900 Callahan Co TX S W Ozment 58 M B Ozment 61 Sallie Ozment 24
Ballard Co KY in 1880. Saml. N. Ozment 38 Mary B. Ozment 40 Selie J. Ozment 12 Emer A. Ozment 10 Robert S. Ozment 7 Sarah A. Ozment 5 Mort. B. Ozment 3 Nancy E. Ozment 8M
On Emma's death it says her mother was Sarah Ann Dodson. her father may have been married before he married Mary B, but I can not find him in an earlier census. Of course, the information on Emma's death record could be incorrect. I think Samuel served from W TN in Civil War. I am familiar with many W TN families, but can not connect him.