Board Thread:General Discussion/@comment-65.96.57.229-20130711024718/@comment-31396746-20170329221529

Being DragonBorn is hereditary. This is proved by the empereors. Who have all beeen DragonBorn (although they never had chances to kill dragons). Its just likely that the Last dragoborn got the blood from Akatosh directly to be part of the prophecy. Although its still possible that you are distantly related to some past dragonborn. Also you're technically not the last, by defeating Alduin you delay the prophecy so that one day it has to repeat and a new dragonborn will appear to fight him (and maybe lose completing the prophecy). So you aren't the last. Finally, talk about off-topic.