I have several Maddox relatives in Mississippi and Alabama. Was your grandfather adopted as a baby or as a young child? Perhaps he was raised by friends of his original parents due to death of his parents (WWI?) or family misfortune. I've found this happened in one other line of my family...that is why I mentioned it. I can check my Maddox lines if you have any information I could use. His adopted name, where he was adopted and/or raised/ birthdate. You can contact me at KarenWare@hughes.net
for his privacy and if you wish to have me check my records. I also have some of this family that had relatives in LA.