Board Thread:Lore Discussion/@comment-50.10.177.94-20130209065558/@comment-4365270-20130223202412

And again technically the fact that Tiber Septim became an emporer further proves this as he was never a septim thus not of Septim blood but he took the name after killing his leige thus proving the fact that Akotosh 'makes' or chooses who is a Dragonborn and who isnt.