Joacheim Wassmund m. Dorothea Dubbert 1806, Germany

Looking for further information on the family of Joacheim Wassmund and Dorothea Louise Christine Dubbert.They were married about 1806 in Zawensdorf, Germany.Joacheim was born about 1781 in Zawensdorf and Dorothea was born in 1785 in Zolkendorf, Mecklenberg-Schwerin.I don't know of Joacheim's parents at this time, but Dorothea's were Joachim Christian Dubbert and Maria Dorothea Ahlgrim.

Joacheim Wassmund and Dorothea Dubbert have one daughter that I know of, Helmina Sophia Maria Wassmund born 1807 in Zawensdorf.She was married to Johann Gaede in 1827.He died in Germany, and she came to America, I guess with her children, but don't know for sure, and she passed away in 1890 in Dundee, Illinois.I had family information that she was buried in the Immanuel Lutheran Church Cemetery there, but am now learning that may not be so.

Any help with this family would be appreciated.

Thanks,
Danielle Nauman
Sparta, WI