My grandma gave me a copy of a letter that you may find useful. The theory of von der ropp is not fairy tale. It is an old aristocratic family. Some of the members have the german "von" and some van wheek [sorry if that was not right, this is barely legible]. I believe that is Austrian. I could be mistaken, but I think it means the same thing. Type von der ropp on a general search engine and you will get a list of information, some in english, some in german.