What if Daenaera is not real, and is, in fact, Jaehaera in Disguise?
What we know about Daenaera makes absolutely no sense. She appears out nowhere, born to parents we've never heard of, and suddenly becomes the front runner for queen. Her father is Daeron Velaryon, of whom appears a grand total of zero times in the entire text till the end.
What if the girl that is brought back from hiding at the end of the War is not actually Jaehaera, but a decoy.
Think on it, if you will.
1.) We know that before "Blood and Cheese" there was nothing different or remarkably slow about Jaehaera. In fact Jaehaera was very active and beloved by both Alicent and Viserys - some might say their favorite grandchild.
2.) It is stated in the book that Alicent and Jaehaera where close, very close. Jaehaera would go to kiss Alicent goodnight every night. In fact, Alicent becomes Jaehaera's defacto mother after Helaena goes mad in the aftermath of "Blood & Cheese".
However, when Jaehaera is brought back to be betrothed to Aegon III, we find a slow, dim, and quiet girl that did not say much. But most telling is that Alicent wants nothing to do with her. Thus, judging by the fact that Alicent pined for her children and grandchildren, remains rather strange that she would ice out her remaining grandchild, while, at the same time, longing for her family.
What if the Jaehaera brought back from hiding is not the real Jaehaera but a fake - a dragon seed. A simple girl that had the look but not the mental faculties to 'give the game away'. And the real Jaehaera was hold up being taken care of by her uncle Daeron till they knew that it was safe for her to return to King's Landing. And once Lord Peake had the fake Jaehaera murdered and they forced him out, the real Jaehaera arrived as a distant cousin of Baela and Rhaeyna named Daenaera Velaryon of whom "her father" was Daeron Velaryon. And everyone who remained of House Targaryen was in on it. And that after her wedding Daeron takes Alicent and they both disappear from history ... and the only people who know the truth are Baela and Rhaeyna
It would and can explain the atrocity of lazy and incoherent writing by GRRM at the end of "Fire and Blood" and also explain why Aegon and Daenaerya's children resemble the Greens. It also would give context, when combined with "Daeron is the Hedge Knight" theory, why everyone down to the the common people of Westeros, believed for generations that Daeron "The Daring" was still alive and remained a shadow that haunted Aegon III, Jaehaerys II, and Aegon IV, for much of their reigns till the Blackfyre Rebellions.
Eh, no offense @thephantomcasebook, but it's a little too tinfoil-y for my taste. For one, Fire and Blood makes it clear that Jaehaera's condition existed before Blood and Cheese:
Alicent is also forbidden from seeing her as she tried to convince Jaehaera to slit Aegon III's throat, terrifying the poor girl. So it wasn't a matter of Alicent abandoning her, it was Alicent's own trauma and anger driving her only surviving grandchild away from her.
I've also come around to Daenaera being married to Aegon III, namely because it means Daeron I is the namesake of both Daeron the Daring (a Green champion) AND Daeron Velaryon aka a son of Vaemond Velaryon who would straight up have died if Rhaenyra and Vizzy had their way. It's just another in the long list of L's that Rhaenyra racks up; the fact that fate is still dunking on her after she was turned into Sunfyre shit is just icing on the cake tbh. It also means that Vaemond wins in the end, which is yet another well-deserved middle finger to Viserys I.
