That is, the Scottish clan “sons of Duncan.” And yes, there actually was a king (Duncan I) who was murdered by his uncle, MacBeth. It’s pronounced roughly “DON-na-key”… with a Scottish accent, of course. ^_^ More about the clan’s history is here. Of all the informational websites I found, Clan Duncan Society was/is the most put together and organized, though I haven’t yet gone much further than the front page. According to donnachaidh.com, Clan Donnachaidh includes the following surnames:

The main clan name and that of the chiefs is Robertson, but many other names taken by those descending from the chiefs or belonging to the families who lived on clan estates and sought the chief’s protection can be considered septs of the clan.

The most prominent are Duncan and Reid but others that may be septs include:

Collier, MacDonachie, MacRobie, Colyear, MacInroy, MacWilliam, Connachie, MacIver, Reed, Donachie, MacIvor, Robb, Donnachie, MacLagan, Roberts, Duncanson, MacLaggan, Robson, Dunnachie , MacRob, Roy, Inches, MacRobb, Stark, MacConachie, MacRobbie, Tannoch, MacConnichie, MacRobert, Tannochy

While I disagree (of course) with the idea that “Robertson” is the clan’s main surname (it’s “sons of Duncan” not “sons of Robertson” ya’ know), I do know that somewhere along the line, the Duncans and Robertsons either merged or one of the founding Duncans had a son named Robert who ended up being an important part of the clan, or something like that. Still, you Robertsons, get your own clan! You don’t even have the right tartan. This is the modern Duncan tartan (drool but hurty in the pocketbook), and this is the modern Robertson one. Not even close, are they? Maybe I’m just biased, but the Robertson tartan is sorta hard to look at… the color contrast hurts my eyes.

On my mother’s side
paternal surname was Owens (Welsh); maternal surname was Sterling (Scottish).

On my father’s side
paternal surname was Duncan (Scottish); maternal surname is Pennington (English).

So, assuming I don’t go back any further than my own grandparents’ respective last names, I’m pretty much from the British Isles through and through (though I know there’s some German and probably some Irish in there somewhere). In this picture of most of Great Britain, the green part is England, the red/yellow part (to the left) is Wales, and the blue/white part (at the top) is Scottish. Obviously, my ancestors had a hard time getting off the island.

But somebody was eventually voted off, ’cause all of my most recent ancestors (that is, my immediate and extended family) are from Texas, not Britannia. More about Duncans in the United States can be found through the Duncan Surname Association and the DNA Project.

PS: If you’ve ever wanted to wear a kilt but never had the excuse, I present Kilt Day. Which, omigawd, is TODAY! Or, if today’s a little bit short notice, you can wear a kilt (with an excuse) on St. Patrick’s Day, or St. Andrew’s Day (November 30, “an annual celebration of Scottish heritage”), or Tartan Day, or No Pants Day. But, an excuse isn’t really needed. Not really. I mean, boys in kilts are hot.

And remember*
You don’t have to be a cowboy to wear blue jeans or a cowboy hat.
You don’t have to be an athlete to wear a tracksuit.
You don’t have to be a pilot to wear a bomber jacket.
You don’t have to be a baseball player to wear a ball cap.
You don’t have to be a hunter or a soldier to wear camouflage clothing.
You don’t have to be a man to wear trousers and…
You don’t have to be a Scot to wear a kilt.

* Shamelessly stolen from KiltDay.com.