I've been holding off on publishing this for a month, because I've had such a difficult time classifying this whisky ... it's an odd bird for sure. But I think it's more or less settled down, so it's time to alert the world.
AnCnoc ("an-nock," also called Knockdu) is a Speyside/Eastern Highland distillery that is outrageously rare to find from an independent bottler. I've seen maybe one independent Knockdu (the distillery seems to use the names interchangeably, although the most recent rebrand leans heavily on AnCnoc) in all my years of drinking scotch. Even that, I may be misremembering.