My great great grandfather was Albert Oldenburg born 24 October 1873 in Deitersdorf, Germany and lived in and died (1948) in Fond Du Lac, Wisconsin. I believe he was married to Anna Oldenburg (Russ). My great grandmother was their daughter Kathryn. If anyone has information on this set of Oldenburgs I would love to chat! They resided in Fond Du Lac, WI.

Update: I have recently learned that Alberts parents were Fredrick Oldenburg and Charlotte Raatz. Albert and Anna's children were: Walter, George, Will, Max, Katherine, Hans, and Charlotte.