If I remember correctly Dragonborn is stemmed from St. Alessa whom made a deal with Akatosh - thus giving her "Blood of the Dragon", and in turn all of her heirs [Tiber Septim, and the rest of the Septim Bloodline] were dragonborn.
That's why in oblivion only they could wear the Amulet of Kings.
But I suppose anybody could be "Dragonborn" if somebody in their bloodline made a deal with Akatosh.
That's just what I remember, cute drawings by the way.
Thank you ^^ I think giving him all the Dragonborn powers would feel like a really badly written fanfic where everything is special and everyone is flawless and awesome. It would be better if the parents would wait and look for the tiniest sign that the Dragonborn blood shows in him but he would disappoint them all the time. (They would love him no matter what.) I know the "I'm a disappointment" and "Why can't I show I'm special?" type of heroes are cliché, but they're still better than the "AND FROM THE FIRST DAY HE COULD POOP FIRE" kind of stuff.
Seems to me that, considering how frankly traumatic adventuring in Skyrim can be, they'd be more relieved than disappointed if their kid turned out not to be another Dragonborn. Especially since the prophecy specifies "the Last Dragonborn" at the end of the world, meaning that if the current one wasn't the last then that might still be a concern.
I like your style. I'm not a fan of "H WAS DRAGOONBARN S HE COLD KELL EVARABYODY!!!" characters. Tragic heros are a bit overplayed as well, but they're much more realistic and can be done right with the right author. I tend to make my characters a bit pathetic but that's just a personal writing style.