Personally I am descended from a Trondheim or Drontheim Klingenberg family. In a fit of desperation I looked through a telephone book and found six listings. One call turned up a Swedish Klingenberg. The next call proved to be a Norwegian Klingenberg who had over his mantelpiece a portrait of a member of the Dons family. He told me his parents had a klingenberg genealogy that traced roots back to 1614. There are at least two communities in Germany named Klingenberg. I have read somewhere that there was an out-migration at the begining of the 17th century and perhaps earlier.