Board Thread:Oblivion/@comment-9716469-20130519212835/@comment-68.153.113.224-20130708185258

From 'The Book of the Dragonborn' -

"The line of Septims have all been Dragonborn, of course, which is one reason the simplistic notion of it being hereditary has become so commonplace.... And of course there is no known hereditary connection between Tiber Septim and any of the previous Dragonborn rulers of Tamriel."

It seems Dragonborn, Septims, and Blood-relation are not all mutually exclusive. Proving that both the relation to Martin theory has validity as well as the non-septim dragonborn theory does as well.