I am looking for information on the Dahlmann family. Johann Heinrich was born October 10, 1771 in Reeken, Prussia. He died May 22, 1876 in Milwaukee, Wisconsin. He immigrated in 1842 with his wife Joanna (Niewerth?) and children: Franz Anton (Anthony), Heinrich Joseph, John, Mary Christina, and Henry. He was supposedly married a second time to Anna Maria Angela Wolter. Johann was my 4th great grandfather. I am looking for his parents/grandparents and confirmation of his marriage to Joanna. Any other information would also be great! Thanks!