I'd just call myself American, since, as the common American of the founding stock of this nation is, I'm of many different European peoples. It's a combination of Norwegian, Irish, German, British, French, and Dutch, as far as I can remember. I'm not giving my money, nor my genetic material, to one of those filthy DNA test companies, albeit, as I don't want them to use their secret Israeli-developed cloning technologies on my spit in order to make a dozen clones of me that will then infiltrate my home, cut holes in the mirrors of my house's bathrooms, hide in them, and then assassinate me when I least expect it as I'm brushing my teeth and think I'm looking at my own reflection, only to then realize it's a clone who is about to disintegrate me with his laser-firing eyes.
As such, I prefer to rely on genealogy records from my grandparents, instead.