I'm half Butters and IIRC Gramps said that they did have their own tartan. But he's long gone and I have no ide where all his info disappeared to. They were from the northern end (no idea what city is nearby) and the clan house was torn down to make way for a dam. Everything's under water there now.
Thanks for the information!
-------------------- "When you see that in order to produce, you need to obtain permission from men who produce nothing; when you see that money is flowing to those who deal not in goods, but in favors; you may know that your society is doomed." Ayn Rand