On it's own, yah, but there are LOTS of other thing like it which sorta push this agenda
- There's a book in Franklin's Vinewood house titled "Red Dead" written by a J. Marston, which could be referring to Jack Marston given his interest in reading and how he said he'd wish to write a book in the future
- When you buy a mansion in the "A Safehouse in the Hills" DLC, you can add a painting by Charles Chatenay which is also identical to painting in Braithwaite manor
- There's a movie you can watch that has assets from RDR1 and is filmed in Tall Trees
And like, there's a lot more too, these are just the ones remember
True, but that could easiley just that the US at some point decided to change the names of these locations for whatever reason