Thomasson was born in Winters, Texas, and raised in Gatesville, one of 10 children in a family where music was not only encouraged, it was a key ingredient of life. His parents were Lewis Alexander and Sarah Elizabeth Wright Thomasson. The elder Thomasson played fiddle, as did his brother Ed, Benny's uncle.
Thomasson, born in Winters, Texas, grew up in Gatesville with nine siblings in a family where music was highly valued and deeply ingrained in their lives. His parents were Lewis Alexander and Sarah Elizabeth Wright Thomasson. The elder Thomasson played the fiddle, as did his brother Ed, Benny's uncle.