It wasn't until I was contacted by a Fredrich researcher, who lives in Germany, that I learned of the area the Fredrich family was from in the late 1700's. He even sent me a book on the area, "Heimat an Netze Brahe Weichsel".
This area eventually became a part of West Prussia, then South Prussia, which became part of the Duchy of Warsaw after Napoleon Bonaparte's victory in the War of the Fourth Coalition. In 1815, it was divided between the Duchy of Posen and Poland. Today, the area is in Poland.