Board Thread:General Discussion/@comment-24.157.36.219-20130614155339/@comment-10207438-20130614190959

here's the thing, there's no proof, or even possible proof, that Tiber Septim's heirs had the dragon soul like he did, however, just because it may have been hereditary in his line doesn't mean that the Dragonborn player is related to the septim line, because he isn't, he was given the dragon blood/soul directly from akatosh, if his line is hereditary it will start with him.