I believe the town you are looking for is called Plau Am See, commonly referred to as Plau. The am See just means on the lake. Many Baustians that were related to Joachim Baustian lived in Plau and the surrounding area. It is close to the Mecklenburg captial of Schwerin. There were also several members of the Baustian family from towns by the name of Crivitz, and Parchim. Plau am See is a beautiful city, I traveled there in 2004. I met a Baustian that is a firefighter in the city. I am not sure how exactly I am related to Fredericke but I believe she may be a great great grandmother or grandaunt. If you have any questions about the area around Plau/Parchim and Schwerin, I would be glad to help.