I just went through my "Death, Marriage & Birth Books" of Marlen, Baden-Wurtemburg and couldn't find Magdalena Klemm who married Lorentz (Lorentius) Kopf. There are a few Kopfs in the Marlen, Kittersburg, Goldscheuer area but not very many. Baden is a large area so maybe they were from another town nearby. Many of the church records were written by the priests so they used the latin spelling such as Lorentius. For a more specific search you need to give us dates and places of events so we can be more precise. I'm assuming, like a lot of the Kopf and Klem families they migrated to Rochester, Monroe County, New York.