Yes that surprised me too. Be careful what you post in silly BS threads, eh?

I spent most of the day looking at:
Dunderbeck
Dunderback
Donderback
Donderbeck
Dondlebeck
Dondleback
Dundlebeck
Dundleback
Doodlebeck (believe it or not, there is a reference to that spelling of the name in the song in my field notes, collected from a Catholic Girls camp in New Hampshire in 1979 when I was but a weee folkie already running around with a notebook)

Now, at least in theory, anyone typing ANY of those, will be led here.