My name is Sarah Karels and found your message on here. I know its a little late past your initial post but I thought I would give you a little information.
I am from Ortonville but my dad's side is all from the Rosen area. John L. (Nicholas's brother) would have been my great-great-great grandfather. His son, Simon, married a Marie (Mary) Schnase in 1881. They had twelve kids and their son Frank J. is the next in my line. He married Clara Stoick and they had six children.
Their son, Raymond, is my grandfather. He married Mildred Spors (which is a really big family as well!) and they had twelve children. There son Frank was my dad. He passed away in 1997 from a car accident.
I recently just started with my ancestry within the past 6 months or so. It seems never ending though! I have so many places where the branches could just go on and on! I'm pretty sure I'm related to almost everyone in the Rosen area!