Jan 28, 4:31pm
It doesn't seem particularly likely as the Nazgul were never reported to appear in Numenor, but something might be done with the idea.
That the Numenorean Nazgul weren't from the island but rulers of Numenorean colonies in Middle Earth: they were styled Kings and nobody on the island was that other than the King of Numenore, but the tyrannical rulers of the Numenoran colonies of Middle Earth could have concievably styled themselves kings to the subjugated Middle Earth natives.
As for the Dwarves, it makes sense that the Rings Sauron will have managed to reclaim from them would have belonged to those Dwarf Lords that ruled in the East, where Sauron held sway.
The Broadbeams and Firebeards will have settled at least in part in the Ered Luin: clearly Bombur (whom we know descends from natives of the Ered Luin) is descended from the former.
(This post was edited by Chen G. on Jan 28, 4:32pm)