he is a cryptojew 100% his name is stoltenberg which is a township by kiel. german names are the profession at the time of the census or if a liege the territory with the von/zu suffix denoting origin of the house and if in current control by the same house. there are no german names that are just places. those are from jews who thought they were clever and when prompted to give a name thought they could get away with claiming to be aristocrats only to then be reminded after noting down their name that impersonation of landed gentry is punishable by death. they didn't get to change their names to something else and so went down in the census with fake names just like most of the ashkenazis who didn't understand the naming schemes.
Germany