I'm a bit confused. Uriel Septim in Oblivion appeared to be an Imperial, but according to Skyrim lore, it is said that....Tiber Septim or Talso was a Nord. So Uriel's family line is Nord now?

Says in the wiki that his race is Imperial. Or is it possible for a family to be interracial? Or for example....a family of Imperials and Nords?

Sort of confused by this....