One is in its own world, but others are in the same one, and I had kinda thought of them as contemporaneous -- and greatly separated in space.
But it occurred to me they could be before and after.
Don't know much about societal changes -- their vast distances would downplay any that happened -- but at least one is likely to be legend. Possibly two, but one is a kingdom-level area of influence.
Though there's need of history that is just history, especially if I allude to his tale. It will look funny if it's the only one.