I checked with my mother and my great uncle J.D. is not the one you mentioned, however I believe you stated you are in Alabama. There will be a Clackum family reunion on August 27th in Smyrna, Georgia and there will be plenty of people available to help you. If you will contact me at
bsmcb@aol.com I will be happy to give you details. I hope this helps since you have had to wait so long.