Thanks Reesie. It's very, very difficult to find details of ancestors in Germany without first knowing the parish in which they were born. That is why we try to hunt down every detail about them here, in the hope there'll be a clue to their origin.
German church registers, censuses, naturalisation papers and local charities are the most likely sources of a birthplace ... and it seems only the latter is a possibility in your case. Fingers crossed.