Hi butterfly! In your recent post about the STAB bloc, you mentioned Aerys' mistress in connection with Prince Jaehaerys' death. That was the first I'd heard of that and so I was curious about the source and if we know anything else. Is there speculation on the mistress' house/identity and by whole family, does that mean the entire house is likely extinct? Thanks!
The source is TWOIAF, which was the first place we ever heard of Aerys and Rhaella’s unfortunate difficulties with fertility and infant mortality between the births of Rhaegar and Viserys.
The march of the king’s madness seemed to abate for a time in 274 AC, when Queen Rhaella gave birth to a son. So profound was His Grace’s joy that it seemed to restore him to his old self once again… but Prince Jaehaerys died later that same year, plunging Aerys into despair. In his black rage, he decided the babe’s wet nurse was to blame and had the woman beheaded. Not long after, in a change of heart, Aerys announced that Jaehaerys had been poisoned by his own mistress, the pretty young daughter of one of his household knights. The king had the girl and all her kin tortured to death. During the course of their torment, it is recorded, all confessed to the murder, though the details of their confessions were greatly at odds.Afterward, King Aerys fasted for a fortnight and made a walk of repentance across the city to the Great Sept, to pray with the High Septon. On his return, His Grace announced that henceforth he would sleep only with his lawful wife, Queen Rhaella. If the chronicles can be believed, Aerys remained true to this vow, losing all interest in the charms of women from that day in 275 AC.
–The World of Ice and Fire
There is no other information, and there hasn’t been any speculation as far as I can tell. (Googling the story only turns up stupid Darkstar theories.) However, I’ll try to see if I can narrow it down a bit.
Aerys had filled his court “with fair maidens from every corner of the realm” and rarely kept a mistress for more than 6 months (and usually less than 2 weeks) – so this girl could have been from anywhere, from any level of nobility.
However, the mistress was the daughter of a “household knight”, which seems likely to mean that the family wasn’t a landed house – perhaps only a bit more prestigious than a hedge knight – or if noble, maybe just a very minor Crownlands house. (Per the other household knights we know from minor noble families, like the Hardyngs and Norcrosses and Hunts, etc.)
I say Crownlands because Crownlands houses were sworn to House Targaryen as their liege lord, and therefore a household knight of the Red Keep would be more likely to be from that region of Westeros than anywhere else.
“All her kin” and “all confessed” tells us it was many people who were tortured to death (not just the father as in the case of poor Bethany Bracken and King Aegon IV), and thus the entire family was made extinct. (As in the case of the Harroways and King Maegor, another situation with an innocent family accused of the murder of an infant prince.)
Therefore this household knight couldn’t have been a Darklyn or Hollard (as Aerys wiped them out after the Defiance of Duskendale). Actually, listing extant Crownlands houses would take too long, so let me just look at the list of houses and find the ones that are extinct now, and weren’t mentioned later in Aerys’s reign…
Well, huh, there’s only one we absolutely know is extinct, House Cargyll. Interestingly, we don’t know why they’re extinct (per info GRRM provided to Elio Garcia for w.org’s heraldry page), just that they died out “under unknown circumstances”. House Cargyll was the family of the famous twin Kingsguards, Arryk and Erryk, who picked opposite sides in the Dance of the Dragons and ended up killing each other. But that wasn’t what ended the family, as Clarence Cargyll attended the Tourney at Ashford in 209 AC. So sometime between then and now, House Cargyll became extinct… and they don’t seem to be a particularly notable house, we don’t have any known lands or castles for them, therefore they seem more likely to be household knights than others… And heck, their sigil is a golden goose on striped black and red… which suggests a beneficence granted by House Targaryen, doesn’t it?
So, there’s my vote. This poor girl, this mistress of Aerys Targaryen that he accused in paranoia of poisoning his infant son, was the daughter of a knight of House Cargyll, a household knight of the Red Keep. And when Aerys had her and her entire family tortured to death, that was the end of House Cargyll.
I could be wrong – GRRM might have left the mistress and her father nameless because he just didn’t care, and House Cargyll’s extinction could have come from something else entirely – but until/unless we get more details in Fire and Blood (volume 2, scheduled after TWOW), I hope you’re pleased with this answer for now. :)