It was a wou but I can never find them if I want to.
I dunno if this is all there is, but...
Uh, the Ladies, Queens and Mothers, their mantles change very, very, very rarely in general. I mean, Mab’s been there for better than 1,000 years. And Maeve’s been there….there was a Winter Lady before Maeve, uh, in Mab’s time. And she didn’t fare so well the last time a Starborn was running around.
(
https://wordof.jim-butcher.com/index.php/word-of-jim-woj-compilation/woj-on-the-fae/, near the end.)
It's not 100% clear to me, from this, that "the last time a Starborn was running around" is the
SAME time as that thousand-years-ago time.
Interestingly, Jim said "better than 1000 years" which would noticeably pre-date Hastings (indeed, predate the birth of William the Conqueror). It could be simple error in speaking; everybody's subject to slip-of-the-tongue errors, carelessness, etc...
Or not.
Everybody's all busy looking at Hastings, while maybe Jim is over there cackling madly about Millenial Madness and the Y1K panic, for example. Charlemagne's kingdom being split into 3 (three Swords?) in 843AD, for another example (or Charlemagne's rise, late 700's through 800AD).