Searching the Web I came to this Forum and informed my nephew and his family about it. He is 11 years old, called Max Wombacher and living in the town of Aschaffenburg / Bavaria / Germany.
In this region between Aschaffenburg and Alzenau the name Wombacher is not the most common one, but still frequently found if you search local adress books. It lookes like this is the only or on of the few regions where this name came from and therefore maybe the root region for a lot of Your family trees. Especially if you have already information going back to Germany, I would like to do further investigations together with Max, to see if there is some more information available here and maybe we could create links to living "far" relatives.