I bet the hero of kvatch's canon is a female nord and at some point had affair with Martin before he died and gave birth to a baby who was a dragon born from having martins blood and it passed down two hundred years to skyrims dragon born! That explains where they got the dragon blood.
Um, no.
It's specifically stated via In-game dialogue and/or books that the Dragon's Blood can come from either noble lineage, OR as a gift from Akotosh, for having the soul of a dragon being accidentally stuffed inside of you.
Besides, the Champion of Cyrodill is Sheogorath. Who is male. And is technically a Breton according to the CK.
? So many questions about whether you are serious or just trolling. Why would the Hero of Kvatch/Sheogorath be a canon Nord? If anything, and please don't look into this, he/she would be a Imperial since the setting is in Cyrodiil. But Bethesda would (hopefully) never make a canon character for lore so this whole thread is rather pointless.
Pretty sure that Glam is an over-enthusaistic fan of the series. Mostly harmless, put prone to throw out ideas that come from left field. Deep left field.