You're hilarious!

What you need to understand is that in Britain, what we call plaids are called tartans--all of them, not just those officially adopted by clans. The word "plaid" comes from the Gaelic word for blanket, & that is how the word is used in the U.K.

So what you're wondering is if your tartan shirts are tartans that represent any clans.

I have no idea.

Sherry