Well, the Bretons...
I disagree with the above poster with some of what he says, but the point is true. You can say the Dunmer are Assyrian, African, Israelite, or, as I have done, Gaelic - but if you do that you'll have to prove your opponent's argument to make them accept your own. The Dunmer are most likely based on each of those cultures.
I'd say the Redguards are far more similar to the Pacific Islanders than they are to the African tribes. But you can't say they are one or the other.
Well you might more accurately claim the dunmer are based on everyday DnD dark elves, with elements of their culture pulled and inspired from multiple real life sources that the devs would have knowledge about, plus a huge chunk of crazy stuff that they made up themselves. I mean, what is a nix hound based on?
This goes for the other races as well.
There's evidence to say the redguards were partially inspired by African or Pacific nations, along with what the devs pulled out of thin air, but this is different from saying they are based on them, which basically means the devs looked at cultures and thought "that's what we're gonna make".
They didn't, which is why although some TES cultures seem to be familiar, there's just as much about them that is completely alien. Deciding questions of lore by saying, "well X real culture were like this so Y Tes culture must be as well" is only conjecture, and often wrong.