Robert "bob" Edney

Hello,
I was searching for my great-great grandfather, Robert"bob"Edney. He may have been born between 1835-1850. He may have lived in tenessee or North Carolina. He wasmarried, but had two sets of children. I beleive he had an untimely demise. One of his sons Samuel(from the other set of children)was a loving hard working family man, and a great humanitarian. Our family is in the process of creating a memorial for him, and we wanted to find out more about his father. Does anyone know this ancestor?