Eb is too young, Bob is nearly 700 years older than Eb, same with Kemmler, and we haven’t met Kemmler.
He was in
A Fistful of Warlocks.
Here's Jim's quote:
Wow, really? I thought it was obvious.
Both of Bob's parents have appeared in the Dresden Files.
My interpretation of "appeared in the Dresden Files" is more like anyone mentioned than one who Harry, or whichever pov character of a short story, has met.
Now Jim doesn't always do his homework but when it comes to Celtic Mythology the guy goes all out.
Cat Sith is pronounced with the Star Wars pronunciation in the books. It should be pronounced the same as, or at least close to, Sidhe. Jim's not always on point with pronunciations. He's admitted so himself. He says there are a lot of words he's only ever read. Cat Sith pronunciation source:
https://www.timberbush-tours.co.uk/news-offers/scottish-folklore-cat-sith-cu-sith.
... as he deserves to be there ...
With the description of the imprisoning process, the one that the British Prisoner went through, we know that any serious player who has "victims" and a conscious would likely have a great deal of guilt because they would have experienced all the suffering they caused. This could alter how "bad" the British Prisoner is.
As to Bob being 1,000 years old, there's a bit of contradictory evidence with Bob stating that he has about 600 years worth of memory. He also says the lost about 100 years of memory when he excised Evil Bob. He had already destroyed some of his memory of his time with Kemmler. But Bob was only with Kemmler for about 40 years, so years of memory is a very squishy measurement of time.
But being a spirit of Air and intellect ... almost certainly means Mab is his mother. ...
but always somewhat insouciant.
I don't see how being a spirit of air and intellect means Mab because of Lash being Bonea's parent.
I don't think Bob was insouciant with Kemmler, but Bob also didn't like who he was when Kemmler had him; Kemmler twisted him, so it's not really an objection to insouciance as a key character trait of Bob.