I too am a great grandson of Landon. The grandson of R Floyd Reece and son of Luther Reece. To answer the question of Joannah parents---you don't have to look too far. She was the daughter of John Reece and his first wife Sara. Yes, Caswell married his half-sister by marriage. I truly wish I knew the circumstance of why Caswell was adopted as an adult, married and with 3 children. I realize this is a very old post, but I would like to know as much and share as much knowledge of Reece/Madron/Thomas/Main history possible.