Alright, so as I understand it, the kilt as we think of it today is of Scottish origin, developed after the price of wool became affordable. However it descended from the Irish liene and a pleated Viking garment, from which the word "kilt", meaning pleated originated. So we have Scottish, Irish, and Scandinavian. Finally, if I am not mistaken the oldest plaid garment was found in a tomb of red-haired, Caucasian people in western China. This tells me everyone has the right to wear a kilt.