You posted this 13 years ago - so I dont't know if this is too late. But we might have some of the same ancestors. My fathers mother Martha was a Maach. Her family came from Oldeslo in the northern part of Germany, then a part of Denmark - they moved to Vinkel near Viborg in Denmark. Her fathers father was number 3 of Martin Maachs children. But look at number 5 - he might be the Johannes Martin Heinrich Maach you are looking for. If you see this, i'll translate the text about him for you.