I start over from what I posted in my first thread:

"...I choose the Royal Steward, starting from the History of "Bonnie Prince Charlie", who was born and raised in Rome, and apparently give the right to the Roman Citizen to wear this tartan because the hospitality given from the catholic people and from Vatican. His mortal remains are still here in Rome, in the crypt under S. Peter Cathedral.

I'm still finding an official confirmation about this. (maybe someone here can help)."

Maybe M. A. C. Newsome can help?