Genealogy / Any Information on Trzemeszno - my ancestors last name was Stiller (Sztyler?) [4]

My ancestors came from Trzemeszno to the United States in 1865. I believe Trzemeszno is around the Poznan region. I don't know much about Trzemeszno and was wondering if anyone could give me some information about the region. My ancestors last name was Stiller, although it has been written as Sztyler to Polanize the last name. I do know that they spoke fluent German and Polish.

Genealogy / Trepke family genealogy [2]

I have been doing genealogy for the Trepke family for about 20 years now, but I can never trace my ancestry back to Poland. My Trepke (the original name was Trepka) ancestors lived in Poznan and many of them came to Michigan before World War I. We still have family in Poland and Germany but I have never contacted them because I do not know what cities they live in. Any Trepke info will be greatly appreciated.