Timbermaster Beatin works with wood.

I still can't say that out loud with a straight face.

Anyway, I want to know how some of the crafting guild leaders got these titles, if they're specifically associated with the title of guild leader, etc. Did they have to pass some sort of special test to get it? Is there more than one person in each guild that has this title at the same time?

All I can recall off the top of my head is Timbermaster Beatin and Forgemaster for both H'naanza and Brithael. Do any of the other guild leaders have similar titles that I can't remember right now?