Here's a good one;
My wife's maiden name is Thompson. After I started getting involved in all this kilt and tartan business, she and a anthopologist friend of ours did a little digging in her family history and figured out that indeed they could trace her family line back to Scotland, Thompson being a sept of MacTavish and Campbell etc. So she started wearing some Thompson tartans and crests around to celtic stuff, so far so good.

But then we figured out her dad was adopted! After more research, and a lot of fees to get records unsealed, we found that her father's birth mother's name was Brown, and although grandma Brown had passed, my wife has a bunch of new aunts and uncles and cousins around Abilene! The blood grampa was harder to track down, but we did and apparently he got around a bit, had a couple other illegitimate kids besides my wife's dad! Oh well!

So... we where able to trace the Browns back to Scotland too, as a sept of Clan Lamont, So now she has a couple more tartans to choose from! Here's what I find kind of funny; if you look at clan history, the Lamonts and the Campbells were not friendly at all, and where on opposite sides of just about every conflict you could find! I told her wear whatever tartan you want, just don't put that Campbell badge on the Lamont or Brown tartan!

She's also related to the Stuarts on her mothers' side, but thats another story!