Thanks, MacMillan of Rathdown. That's what I thought the case might be.

In closing, the important bit is the "be descended from" part. If you really want to know if you have a connection to a particular tartan you have to do the research!
I don't know if Josh is in the same boat as me, but it might be possible that he's asking the question because the research leads nowhere. That's where I am with it. I've been poking into family history, and my maternal grandfather who died a few years ago had done a lot of genealogical work. But he ran up against a roadblock. There was a church fire in Alabama in the 1840s, I believe, where all the county records were housed. It is impossible to follow the research any farther back than this, as the records were destroyed.

So all we have is my mother's surname (which is listed as a sept of two different clans) and verbal tradition which points to one clan, with no possible way to follow the evidence to be sure.