Wolf relatives in Schwarme and Rottenburg

I have found Wolf family members immigrating from Schwarme in 1911 and 1923. I believe this might be south of Bremen. Heinrich, born approx 1864 and his wife, Sophia Rippe,born approx 1866 had either 7 or 8 children. One son, Heinrich married Anna ?
and may have moved to Rottenburg. Is there any way to get more information. I do not read German. I have been told the German spelling is Wulf? I don't have specific birth dates but it could be 1890 to 1905. The family may have been Lutheran. Most members immigrated to Minnesota. Thank you in advance for anything. DB