I'm afraid that I do not know much about Martha Trussler / Truslow. I believe that she was shown on the 1850 Census for Virginia. She was certainly shown on the 1880 Census as being aged 62, born in Tennessee.
I am interested in your suggestion that she was the daughter of John and Rebecca. Can you tell me something more about this?
I, by the way, am doing worldwide research into the surname Trus(sler, Tus(s)ler, Truslow, Truslove etc etc and I currently have more than 17,200 related names in my database. Perhaps you will contact me on firstname.lastname@example.org