Have you created a profile for this man, including the details you have about him and the sources you have found? Other members are more likely to be able to provide meaningful advice if they can use the information you have already as a launching pad for further research. (If you have started a profile, "edit" your question above and insert a link in the appropriate box.)
Also, as a piece of general advice, when trying to break down a brick wall it's often very helpful to research and document other family members that we know about (such as brothers and sisters of the person whose parents we are looking for).
