Board Thread:Lore Discussion/@comment-186.215.22.127-20130215011559/@comment-5737364-20130215013410

I would assume Tiber Septim is an Imperial due to the fact that his grandson, Pelagius Septim, is an Imperial as well, along with all those of his line. Also, Wulf is an aspect of Tiber Septim and he is an Imperial also. All things that I see point to him being an Imperial, but make your own decision on the matter.