This is the official Coat of Arms of the Glunk family, and it clearly shows the origin of the name: the "Glonker" in old German were the craftsmen who made the bells (or rang them, or maybe they drank wine out of them, or something). Even today, the Glunks ring bells frequently, but now on telephones. The Coat of Arms was photographed with a big zoom lens, because it was painted high up on a wall in the small town of Neudingen, near Donaueschingen on the edge of the Black Forest, where Karl grew up.