ps I bet the kilt shop convinced you that there really was a Kurnitowkski tartan.
Well not quite Colin but I do have a letter confirming the right to wear the Guthrie Tartan as a result of links going back to Bonnie Prince Charlie. Charles was the son of James Francis Edward Stuart who was in turn the son of James II and VII, who had been deposed in the Revolution of 1688. Charles' mother was James' Polish wife, Maria Clementina Sobieska 1702–1735, granddaughter of the Polish King, John III Sobieski. The Sobieskis were ancestors of mine on my grandmothers side and later assistance by my grandfathers side of the family to the Bonnie prince led to the symbol of the boat and thistles being introduced into the Kurnatowski coat of arms.