I have traced my family back to Johann Hermann Koppelmann, born into the Lutheran church in Badbergen in 1811; he and his wife, Anna Maschmann, emigrated to Baltimore County, Maryland, in 1834, from Badbergen. J.H.K.'s parents were named Henrich Koppelmann and Helena Margaretha Dettmer. Are these people part of your family tree? If so, I have a family tree for the Koppelmans in Maryland that extends up until the 1980s. Please contact me directly so we can talk on email. I hope yours is the same family as mine!