according to this mini bio - no. http://www.nndb.com/people/777/000173258/
Tommy Horton is NOT related to Johnny Horton. His father was J. C. "Coyle" Horton and his mother was Mary Gwendolyn Horton, both of Brownwood, Texas where Tommy was also born. He has one sister,...
Yes, they're sisters. Shanell is D.Wood's little sis.
TOMMY IS STILL GOING STRONG AND ABOUT TO GO ON TOUR WITH DOCTOR DOLITTLE