In appearance, the Skaal are clearly of Nord ancestry.
lolwut, Europeans may have distinct accents, but they still look the same.
most of them, and that's not even a good example.
All Nords are descendants of the Atmorans.
It's like asking if the Crowns should be a different race than the Forebears. The answer is no because they are essentially the same race.
There are about three things that determine the difference between races. First they need to have a completely distinct cultural difference(different language, different religion, etc.) Secondly, they need to have completely distinct racial features (ie different skin colour.) Third, they just need to be very different. Did I stress different enough?