My mum, our family's chief genealogist, has been contacted by someone through ancestry.com who's tracked back one line of his (and our) family to the 5th Century. When the names along that line switch from Scottish to Danish. I'd like to see the research some time.
So to recap, my ingredients: German, Mennonite (same thing), Irish, Scottish (same thing), Scots-Irish (ditto), English, and may contain traces of Danish/Viking/troll. There's a simpler way to spell that out, and it's "Canadian". E.g. my kids' ingredients: Japanese, Canadian.