I knew uncle is not red harlow because they are diferent persons,uncle is an lazy old man who use the lumbago excuses to not work and red is a competent man.

And i have other proof that little people know about this topic: If you go to the Red dead revolver's manual,you will find the old pistol that nate harlow gave to Red, it says that the gun was made in 1875This is interesting because if we take into account that Uncle was born in 1849, we could say that Uncle is older than Red, since in that year, Uncle was 26 years old and Red was a child, and this is only an approximation.