Looking for my Marlow cousins

I am looking for two children of my uncle Harold Lewis Marlow b 1/18/1936 in Rossville, GA d 7/30/1995 in Toledo, OH.

His first son was born Harold Lewis Marlow Jr on 11/24/1968 in Chattanooga, TN.Mother is Ruby Traxler.Harold's sister cared for Harold Jr for the first year of his life, after which he became a ward of the state.She is getting on in years and has often asked about Harold Jr.

We did not hear from Uncle Harold for some time.His sister called him in early 1970 to let him know their father was dying.He mentioned at that time he had another son.He did not mention the child's name or whether or not he was married to the child's mother.Our best guess is that the child was born sometime between Nov 1969 & Feb 1970.

If anyone has any info on these two I would greatly appreciate hearing from you!

Thanks in advance
~Audrey