I don't think the Kin were regarded as fairy tales but more extinct.
Anyway, even if Leif didn't tell him about them being decedents, surely someone as smart as Josef would of put two and two together, but then maybe he claimed the tale to be untrue so that the Pirran's can remain a secret. Bah, somethings are best left unexplained.....mainly because trying to think up an explanation hurts the brain, but thats just me 😄 .
Too bad about the Harry Potter movie, i was invited to see it today...well yesterday, but i was feeling too sick to go...and on the holidays too, thats what i call unfair.