Simple surname queries without any supporting information are strongly discouraged. For most surnames, there are simply too many individuals with the same name for a surname request to be useful. Include also what sources you have consulted, successfully or not, in your search. Be concise but informative. Make your question clear.
Many people prefer that surnames be written in all caps to aid visual scanning.
Post well-formed surname queries on Usenet as discussed below to soc.genealogy.surnames.german. Be advised that it is unlikely that you will find someone willing to do extensive research for you for free unless he or she is related to the subject of your search. However, you may receive valuable advice that may turn your dead end into a new lead. Also, common courtesy would require that, when you receive advice or leads, you act on them before repeating the query. No general rule applies in every case.