Liese, I do not have any documentation on this; but I show Abraham Graeff of Duesseldorf, Germany, as father of Herman Isacks Op den Graeff. Pat Langwell Weaver of "Graeff", or "DeGraeff" I'm still > not > > sure where either one stands in connection with Op den Graff yet, whether > it > > was ever proven that one or the other was definately a form of, and > > connected to the Op den Graeff name, but I sure would love to know. > > > > Liese