Hello from Germany!
I've been working on the Ketterhagen and other families from Lüdinghausen for quite some time. I'm very interested in the subject of chain migration, in the destiny of those who emigrated to North America and especially those who settled in or near Burlington, Racine Co., because this is where they seemed to concentrate.
I just published an article in English language about the families and individuals from Lüdinghausen and the surrounding places that arrived in summer 1846 including the Ketterhagen's, Daldrup's, Honerman's and Scholbrock's.http://familienforschung-steiner.blogspot.de/2014/05/from-lu...
There's more genealogical data about families from Lüdinghausen available on my webseite, but most of it is in German.