If he married and had children, I'm looking to contact any direct descendant of.....

Dr. Thomas J. Kennedy of Castalian Springs, Sumner County, TN

I believe he is the following soldier:

Thomas J. Kennedy
Surgeon
Robison's 2nd Regiment Tennessee Infantry
Walker's Legion.

and I think this may be his find-a-grave memorial:

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GScid=2324588&GRid=42338462

If he did not marry, I'd like to contact any lateral descendant.

Barry N. Wyatt
Montgomery, AL