From W & A K Johnston's 1906 publication which states that it was taken from a piece of tartan dyed and woven by the wife of Alexander XVI of Keppoch who was killed at Culloden. Prince Chalres was said to have been given a plaid in this tartan which he left at Moy Hall in his rushed escape from there. It was kept by the MacKintosh's.
MACDONELL OF KEPPOCH (MODERN)