I am investigating the Wittenburg/Pleggenkuhle line from New Hampton, IA. My Great Grandparents were Joseph Henry Wittenburg who married Augusta Henrietta Pleggenkuhle. They had several children (Margaret, Louise, Nellie, etc.). Is there any chance that this is any connection to your Pleggenkuhle line? It is my understanding that they are of German descent. Thank you for your help.