Of course, if you wanted to be more "covert" about the whole thing, which would only make sense to those who were "in" on the whole thing, you could register the tartan name as the "R'lyeh" tartan. Then only those who were familiar with Lovecraftian lore would know...

But seriously, if you ever wanted to order fabric in that tartan, I bet you could get some support and people to go in on the purchase if you opened the offer to the folks at the Lovecraft Historical Society.... (Just a thought).