Parentage of Addam and Alyn of Hull

[Pukisbaisals]

 

Officially Addam and Alyn were legitimized bastards of Laenor Velaryon, only no one really believed it, because Laenor was homosexual.

Mushrom provided more plausible version on parentage of Adam and Alyn:

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„Mushroom puts forward a more plausible possibility on Addam and Alyn's parentage: that it was Lord Corlys himself who fathered both boys, back when he spent many of his days at the shipyards of Hull where Marilda's father was a shipwright. The boys had gone unacknowledged, kept far from court, while the fierytempered Queen Who Never Was lived. But after her death, Lord Corlys took the opportunity to acknowledge them...after a fashion.“

Only how Addam could became dragonrider then? Corlys Velaryon was not dragonrider and couldn’t have been of recent Targaryen ancestry.

Most likely dragon blood of Addam came from their mother side – Marilda of Hull was dragonseed herself (else their father was not Velaryon, but Targ, maybe Daemon).

I have an idea, that Marilda was in fact Saera Targaryen, wayward daughter of Jahaerys and Alysanne.

 

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Though given to the Faith as Maegelle was, Saera did not have Maegelle's temperament. She ran away from the motherhouse where she was a novice and crossed the narrow sea. She was at Lys for a time, then Old Volantis, where she ended her days as the proprietor of a famous pleasure house.

Saera was second youngest daughter of Jahaerys, she could be born in 80 (in awoiaf her birth year is estimated between 62 and 82), then she could be 35 when Addam was born.

Sea Snake could easily find her in Essos and secretly bring her back to Westeros as his paramour. Then Marilda is not from Hull town, but from hull of Sea Snake ship .

Of course Saera/Marilda could never reveal her true identity, because of her conflict with faith and her pleasure house career.

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Ser Otto’s fifteen-year-old daughter Alicent became his constant companion, fetching His Grace his meals, reading to him, helping him to bathe and dress himself. The Old King sometimes mistook her for one of his daughters, calling her by their names; near the end, he grew certain she was his daughter Saera, returned to him from beyond the narrow sea.

I think this mistake of Old King could be caused not merely by his wish to see long lost daughter, but by some of his prophetic Targ dream about Saera’s coming back in future.

[Lord Varys]

That doesn't make a lot of sense. We know that your parents don't have to be dragonriders themselves, nor is there any reason to believe that you need immediate dragonrider ancestry to become a dragonrider yourself.

Brown Ben Plumm didn't exactly have Targaryen parents or grandparents, but he is descended from at least one Targaryen - Princess Elaena (and perhaps from Aegon IV, too) - and that's more than enough for him to get along with Dany's dragons splendidly.

Corlys Velaryon may not have a Targaryen parent, but he could easily enough have a considerable number of Targaryens among his more distant ancestors, just as Ulf, Hugh, and Nettles don't have any immediate Targaryen ancestors we know about yet still became dragonriders.