I see (in a quote from a deleted post) a list of VS tartans, several of them with notes to the effect that older and different tartans were attributed to certain clans (Bruce, Chisholm and Fraser, in fact) by Wilson's of Bannockburn. However, it is well known that Wilson's started out with numbers representing their own designs and gradually replaced those numbers with the surnames of customers who had bought them. The Wilson's tartans are scarcely any more authentic than those in the Vestiwhatsit Scottithingamajig, although at least they admitted what they were doing at the time, but now people think those are ancient clan tartans as well. It's all smoke and mirrors.