Board Thread:Oblivion/@comment-9716469-20130519212835/@comment-6881629-20130520135148

Martin was not a Dragonborn when you hear people say the Emperors had the blood of a Dragon they were refering to the Amulet of Kings (only a few of the very first Emperors were Dragonborn i think). It also say's on his wiki page he had no children and was the last in the Septim line. It is your game though you can roleplay however you want.