Hi Hagen, my name is Hans T. but my son is called Hagen. He is a student of bioinformatics, now 2003 in Grenoble in France. But his basic adress is in Berlin. Sorry I don't no anything on your grandfather, but your family probably comes from Silesia, where this name is quite familiar. The origin are in Vienna, Austria, where our ancestors came from during the time of Maria Theresia. Where are you living? Hans.