David,
The term creach later became used to describe plundering (probably derived from falling, ie, "fall from grace".)
I hadn't realized that Creachery was a word... very interesting. That means it would have been pronounced "McCreh" and not "McCree" since we know the pronunciation of "treachery".
That might make the McCrea/Chery riddle more likely in a way, seeing that the pronunciation is the same, and not pronounced "McCree".
Well, here you are getting me going again.
Let's see if we can find out if it was a C or G before we go any further... too much left to question right now unless we really know the name.
Cheers