When I was trying to see about a tartan for US National Park Service Rangers, one option was to adopt a tartan, in this case, the Muir tartan, in honour of John Muir, the Scottish enviromentalist. I wrote the Clan Muir society for their permission, and they were very honoured by the gesture.

Sadly, the idea never advanced any farther than this, but I felt better knowing that the Clan Muir Society gave their "blessing" to it.

Cheers,

Todd